Chapter Summaries

Kudo Shinichi and Mouri Ran questioned witnesses to reconstruct Kogami Mai’s actions before Kamata’s death and deduced why she had delayed returning the drinks. They left to search for evidence that could expose a lie in Kogami’s testimony.

• Kudo Shinichi explained that investigators needed to reconstruct Kogami Mai’s movements because the crime scene container was unlikely to yield useful evidence.
• Suzuki Sonoko recalled that Kogami Mai anxiously asked when the delayed performance would begin, left four drinks on a windowsill, and went to the restroom.
• Kudo Shinichi and Mouri Ran deduced that Kogami Mai had discovered the drink switch and waited for the performance to start so Kamata could not exchange his poisoned cola.
• Kudo Shinichi and Mouri Ran concluded that the delay disrupted Kogami Mai’s plan and that evidence might reveal a lie in her account.
• Kudo Shinichi and Mouri Ran left together to search for evidence, while Suzuki Sonoko wondered whether they made a good couple.

Kudo Shinichi and Mouri Ran uncovered evidence that Kogami Mai had lied about going to the restroom and had hidden outside the venue by the windowsill. They concluded she stayed there to watch the poisoned drinks and prevent anyone else from taking them, exposing her as the likely culprit.

• Mouri Ran suggested investigating the pine tree outside the windowsill, where someone hiding there might have left traces.
• Kudo Shinichi and Mouri Ran questioned Kogami Mai's colleagues, who confirmed she had stayed with them until she claimed to go to the restroom.
• Mouri Ran found pine needles in Kogami Mai's hood, and Kudo Shinichi linked them to the tree outside the window.
• Kudo Shinichi used the witnesses' timeline and the pine needles to show that Kogami Mai had gone outside instead of directly returning from the restroom.
• Kogami Mai asked how they had discovered her lie, and Mouri Ran explained that they believed she had hidden nearby to keep anyone from taking the poisoned drinks.

Lin Xinyi, Mouri Ran, and Kudo Shinichi exposed Kogami Mai as the murderer of Mr. Kamata, and she confessed that she killed him to punish him for secretly killing a patient. Kogami Mai surrendered, while Kudo Shinichi’s satisfaction at solving the case was spoiled when officers praised him as Officer Lin’s girlfriend.

• Lin Xinyi arrived with Caesar, whose reaction and scent evidence tied Kogami Mai to the potassium cyanide hidden in Mr. Kamata’s car.
• Kogami Mai confessed that she had planned to disguise Kamata’s death as suicide, but her concern that an innocent person might take the poisoned drink led her to watch it and exposed a flaw in her plan.
• Kogami Mai revealed that she killed Kamata after discovering he had secretly altered a patient’s medication to conceal evidence contradicting his research.
• Kudo Shinichi and Mouri Ran acknowledged that Kogami Mai had acted without a personal grudge, but Kudo reminded her that she still had to answer for taking justice into her own hands.
• Kogami Mai surrendered to the officers and praised Kudo Shinichi and Mouri Ran, while Kudo’s pride faded when the officers called him Officer Lin’s girlfriend.

After solving the school festival murder, Kudo Shinichi and Mouri Ran returned to the dressing room, where Shinichi suddenly developed a fever and fainted before they could finish their kiss. He woke to find that Ran confirmed they had kissed, though Lin Xinyi and Vermouth had also discovered his disguise and his odd embrace of Caesar.

• Kudo Shinichi and Mouri Ran shared a romantic moment after Kogami Mai was arrested, then headed to the dressing room hand in hand.
• Suzuki Sonoko warned Lin Xinyi not to enter the dressing room, but he followed Ran and Shinichi there with Caesar.
• As Shinichi and Ran leaned in to kiss, Shinichi developed a fierce fever and collapsed before he could tell whether they had kissed.
• While Shinichi slept, Caesar licked his face, and Shinichi hugged the dog; Lin Xinyi arrived and found Shinichi in his knight's clothes with a black lace bra visible beneath his open jacket.
• Shinichi woke and anxiously asked Ran whether they had kissed, and Ran confirmed that they had.

After Conan returned to his child form, he happily recalled confessing to Ran as Shinichi, while Lin Xinyi and Haibara Ai dealt with the consequences of Lin’s poor romantic instincts. Vermouth tried to push Lin and Ai toward a date, but the chapter ended with her offering them just enough money for two days in Karuizawa and one hotel room.

• Haibara Ai examined Conan and collected blood samples after the antidote wore off, and Conan left to see Ran after confirming that he had confessed to her as Kudo Shinichi.
• Lin Xinyi and Haibara Ai mocked Conan’s earlier lack of romance, while Ai grew frustrated that Lin still treated their time together like lab work.
• Vermouth urged Lin Xinyi to take Haibara Ai out, and Lin revealed that he planned to join the Mouri family’s trip to Karuizawa after hearing Conan would be there.
• Lin Xinyi invited Haibara Ai, Vermouth, and Caesar along, then insisted he had never thought of taking Ai on a date.
• Vermouth asked Lin Xinyi to return her bank card and offered him enough money for two days in Karuizawa and one hotel room, catching Haibara Ai’s attention.

Haibara Ai asked Vermouth for advice on getting closer to Lin Xinyi, worried that his treating her like a child would keep them apart. Vermouth claimed Lin Xinyi had already noticed Haibara’s attempts to get close to him, and Haibara agreed to become her student before their Karuizawa trip.

• After Lin Xinyi went to the restroom, Vermouth teased Haibara Ai for being unromantic and encouraged her to increase physical contact with her boyfriend.
• Haibara Ai explained that physical contact mattered to human relationships, but worried Lin Xinyi would keep his distance while she remained an elementary school student.
• Vermouth told Haibara that she had deliberately arranged for her and Lin Xinyi to stay in one room and said he had noticed Haibara’s intentions.
• Haibara Ai panicked at the thought that Lin Xinyi already knew she liked touching him, then agreed to learn flirting techniques from Vermouth.
• Vermouth smugly told Haibara she could call her Teacher.

The Mouri family set off for Karuizawa, where Haibara Ai tried to use Vermouth’s flirting advice while riding in Lin Xinyi’s arms. Lin Xinyi mistook her affectionate head-rubbing for an itchy scalp, leaving Haibara mortified and yelling at him to shut up.

• Haibara Ai arranged to ride in the front with Lin Xinyi, but Caesar leaped into his arms first and resisted being moved to the back seat.
• Lin Xinyi finally pushed Caesar into the back, where it squeezed into Mouri Ran’s arms, and Haibara settled into Lin Xinyi’s embrace.
• During the drive, Haibara followed Vermouth’s advice by rubbing her head against Lin Xinyi’s chin, and he gently stroked her hair.
• Lin Xinyi asked whether Haibara had an itchy scalp and speculated that she might have a fungal infection or athlete’s foot.
• Haibara shouted at Lin Xinyi to shut up.

During the Karuizawa trip, Mouri Kogoro mistook Kisaki Eri’s male colleague for a romantic rival, then embarrassed himself by flirting with Eri’s colleague Uesugi Ritsuko at dinner. Haibara Ai watched Ritsuko make advances toward Lin Xinyi, who defused the situation by calling her “Auntie Uesugi.”

• Lin Xinyi carried Haibara Ai during the group’s Karuizawa outing, while Mouri Kogoro questioned his closeness to Mouri Ran.
• Mouri Kogoro saw Kisaki Eri tying Saku Hoshi’s tie and suspected an affair, but learned she was choosing a tie as a gift for him.
• Mouri Ran agreed to a dinner with Kisaki Eri’s lawyer colleagues, where Mouri Kogoro got drunk and flirted with Uesugi Ritsuko.
• Haibara Ai judged Uesugi Ritsuko to be deliberately seducing men and grew uneasy when Ritsuko approached Lin Xinyi.
• Lin Xinyi shook Uesugi Ritsuko’s hand and called her “Auntie Uesugi,” leaving Haibara Ai relieved by his apparent obliviousness.

At a dinner party, Uesugi Ritsuko tried to upset Kisaki Eri by flirting with Mouri Kogoro and then Lin Xinyi. Lin repeatedly called her “Auntie” and declared that she looked older than Kisaki Eri, leaving Ritsuko humiliated.

• Uesugi Ritsuko decided to exploit Mouri Kogoro as Kisaki Eri’s weakness and flirted with him at dinner while Kisaki Eri and Mouri Ran watched.
• After seeing Lin Xinyi with Mouri Ran and Kisaki Eri, Uesugi Ritsuko mistook him for Kisaki Eri’s future son-in-law and planned to provoke her by flirting with him too.
• Uesugi Ritsuko introduced herself to Lin Xinyi and offered him her hand, but he greeted her as “Auntie Uesugi.”
• Lin Xinyi explained that he had followed Kisaki Eri’s lead and sincerely apologized, then said Uesugi Ritsuko looked older than Kisaki Eri.
• Kisaki Eri struggled to keep a straight face as Uesugi Ritsuko reacted with humiliation to Lin Xinyi’s blunt assessment.

At dinner, Lin Xinyi praised Kisaki Eri’s youthful looks, prompting Uesugi Ritsuko to turn her attention back to Mouri Kogoro. Haibara Ai explained to Lin Xinyi how Ritsuko used flirtatious tricks, then accidentally repeated one herself when their hands touched as they reached for their cups.

• Lin Xinyi told Kisaki Eri that she looked younger than Uesugi Ritsuko, improving Kisaki’s mood and irritating Ritsuko.
• Uesugi Ritsuko left Lin Xinyi alone and resumed flirting with Mouri Kogoro, while Haibara Ai criticized her as a manipulative woman.
• Haibara Ai explained that Ritsuko had faked drunkenness with makeup and used suggestive gestures and strategically placed wineglasses to encourage Mouri’s attention.
• Lin Xinyi wondered how Haibara knew so much about seduction and worried she had dated before, but Haibara scolded him and refused to explain.
• Lin Xinyi and Haibara Ai accidentally touched hands while reaching for their cups, and Haibara dismissed it as coincidence while covering her neck with her hair.

Lin Xinyi and Haibara Ai realized Uesugi Ritsuko was targeting Kisaki Eri and intervened before she could take the drunken Mouri Kogoro away. The chapter ended with Kisaki confronting Ritsuko in her room while Haibara hurried Lin Xinyi away from Saku Hoshi.

• Haibara Ai told Lin Xinyi that Uesugi Ritsuko was likely trying to hurt Kisaki Eri rather than pursue Mouri Kogoro for his own sake.
• Uesugi Ritsuko tried to take the drunken Mouri Kogoro back to his room, but Lin Xinyi and Saku Hoshi took him from her.
• Kisaki Eri said she knew what Ritsuko was doing but claimed she no longer cared about Mouri Kogoro, then left the restaurant.
• Lin Xinyi and Saku Hoshi carried Mouri Kogoro to his room, and Saku recognized Lin Xinyi and his police dog, Caesar.
• Lin Xinyi and Saku encountered Kisaki Eri entering Uesugi Ritsuko's room to talk, and Haibara Ai took Lin Xinyi away before he could accept Saku's invitation to chat.

Haibara Ai tried to use Vermouth’s flirting tricks to get closer to Lin Xinyi, but his practical responses thwarted her plans. After she slipped in the bathroom, Lin Xinyi turned off the light and wrapped her in a towel, leaving her embarrassed and frustrated.

• Haibara Ai used the travel budget to leave Lin Xinyi with enough money for only a room, but he booked a discounted twin room and offered to buy her more cake with the savings.
• Haibara Ai asked Lin Xinyi to smell her, but he used the laboratory wafting method and told her she smelled sweaty.
• Haibara Ai scrubbed herself repeatedly in the bathroom, then slipped on the wet floor and cried out.
• Lin Xinyi opened the bathroom door, turned off the light, wrapped Haibara Ai in a towel, and lifted her by locating her through sound.

Lin Xinyi cared for Haibara Ai after she sprained her foot, then ran into Kisaki Eri in the hotel corridor after she visited Uesugi Ritsuko. Kisaki asked him to keep her confrontation private and shared her frustrations about Kogoro, while Lin Xinyi misread her comment about him.

• Lin Xinyi wrapped Haibara Ai in towels, checked her sprained foot, and left to fetch ice while she changed.
• On his way back with ice, Lin Xinyi encountered Saku Hoshi and Kisaki Eri in the corridor, where Kisaki appeared disheveled after leaving Uesugi Ritsuko's room.
• Kisaki denied that anything had gone wrong with Uesugi Ritsuko and asked Lin Xinyi not to tell Ran or Kogoro about what she had done.
• Kisaki complained that Kogoro had not changed in ten years, and Lin Xinyi listened without criticizing him aloud.
• Kisaki said she wished Kogoro were more like Lin Xinyi, prompting Lin Xinyi to misinterpret her meaning and nervously button his suit jacket.
• Kisaki clarified that she meant Kogoro should be as honest as Lin Xinyi.

Lin Xinyi tended to Haibara Ai’s sprained ankle and misunderstood her accident as an attempt to get closer to him, while Haibara struggled with her growing feelings. After they spent the night together, an urgent knock revealed that Miss Usui had died.

• Lin Xinyi examined Haibara Ai’s swollen ankle and mistook her bathroom fall for a deliberate attempt to get his attention.
• Lin Xinyi apologized for keeping his distance, but stopped short of becoming intimate with Haibara.
• Lin Xinyi lay beside Haibara, and she admitted she had come on the trip because she wanted to sleep with him.
• Haibara woke beside Lin Xinyi and leaned in to give him a secret good-morning kiss.
• Someone urgently knocked on the door and told Lin Xinyi that Miss Usui was dead.

Lin Xinyi exposed how the security-chain trick created the appearance of a locked-room murder and found skin flakes beneath Uesugi Ritsuko’s fingernails, pointing to a scratched killer. Kisaki Eri then revealed that she was the person with scratch marks.

• Saku Hoshi explained that he and his colleagues found Uesugi Ritsuko unresponsive and forced open her chained door.
• Mouri Ran reported signs of asphyxiation and oral injuries, concluding that Uesugi Ritsuko had likely been smothered.
• Lin Xinyi found that someone had cut the security chain with pliers and tied it back together with fishing line, making Saku Hoshi appear suspicious for breaking the door open.
• Lin Xinyi entered the room and found skin flakes beneath Uesugi Ritsuko’s fingernails, identifying someone scratched during the struggle as the leading suspect.
• Mouri Kogoro called for the lawyers to show their arms, and Kisaki Eri said that she was the person with scratch marks.

Kisaki Eri admitted that she had fought with Uesugi Ritsuko the night before, making her the prime suspect in the murder. Lin Xinyi used the timing of Eri’s wound and the victim’s estimated time of death to weaken the case against her, while Mouri Kogoro vowed to clear his wife’s name.

• Kisaki Eri said she had confronted Uesugi Ritsuko around ten o’clock and been scratched during their fight, leaving skin flakes beneath the victim’s fingernails.
• Kisaki Eri argued that the evidence showed only that she had fought with Uesugi Ritsuko, not that she had killed her.
• Lin Xinyi examined Kisaki Eri’s wound and estimated that Uesugi Ritsuko had scratched her before eleven o’clock.
• Lin Xinyi estimated that Uesugi Ritsuko had died around midnight, so the skin flakes did not prove Kisaki Eri had killed her.
• Mouri Kogoro stepped forward and declared that he would clear Kisaki Eri of suspicion.

Mouri Kogoro tried to help clear Kisaki Eri and proposed using scent evidence to identify the murderer. He then reasoned that the killer likely removed their gloves to reattach the cut security chain, leaving fingerprints or skin flakes on the door.

• Mouri Kogoro stepped forward to investigate, but Mouri Ran and Kisaki Eri told him they did not need his help, while Lin Xinyi continued examining Uesugi Ritsuko's body.
• Lin Xinyi determined that Uesugi Ritsuko had died around midnight, making the skin flakes beneath her fingernails useless as evidence against Kisaki Eri.
• Mouri Kogoro suggested comparing scents on the pillow and blanket with samples from people connected to Uesugi Ritsuko, though Mouri Ran pointed out that police dog identification was already standard procedure.
• Mouri Kogoro explained that reconnecting the cut security chain with fishing line from outside the door would have been difficult to do while wearing gloves.
• Mouri Kogoro concluded that the killer likely touched the door while working without gloves, so investigators might find fingerprints or skin flakes near the chain using a magnifying glass and a Multi-Wavelength Light Source.

Mouri Kogoro used fingerprints, skin flakes, and Caesar’s scent examination to pressure Uesugi Ritsuko’s lawyer colleagues, and Saku Hoshi confessed to her murder. Lin Xinyi and Kisaki Eri doubted the confession despite Saku’s detailed explanation, leaving the case unresolved as he insisted he was the killer.

• Mouri Kogoro found fingerprints and skin flakes near the security chain and asked Ran to have Caesar identify the culprit by scent.
• Saku Hoshi confessed to killing Uesugi Ritsuko, saying he acted because she represented Mitsui Chemical against villagers from his hometown.
• Mouri Kogoro accepted Saku’s confession, but Lin Xinyi and Kisaki Eri remained suspicious of his crude locked-room method.
• Saku explained that he had tried to make Uesugi’s death look like acute alcohol poisoning and admitted he had not considered the forensic evidence.
• Lin Xinyi questioned why Saku had overlooked so many ways his scheme could be exposed, while Saku continued to request that they take him to the police station.

Lin Xinyi exposed Saku Hoshi’s confession as a fabricated attempt to take the blame, proving that Uesugi Ritsuko’s body had been moved after her death. He challenged Saku Hoshi to explain who moved it, leaving the identity of the real culprit unresolved.

• Saku Hoshi confessed to killing Uesugi Ritsuko, but Lin Xinyi questioned his account and said he had lied about when and how she died.
• Lin Xinyi concluded that Saku Hoshi was trying to shield someone and had staged evidence to make himself appear guilty.
• Lin Xinyi explained that livor mortis on both sides of Uesugi Ritsuko’s body showed she had initially lain face down before someone turned her onto her back.
• Lin Xinyi said evidence showed Saku Hoshi entered the room one or two hours after Uesugi Ritsuko died and asked who had moved her body.

Lin Xinyi exposed Saku Hoshi’s false confession: Saku had moved Uesugi Ritsuko’s body and staged the scene to protect Kisaki Eri, whom he suspected of killing her. After Kisaki angrily rejected his sacrifice, Lin said his deduction suggested the case might have no killer at all.

• Lin Xinyi used the Livor Mortis evidence to show that Saku Hoshi had moved Uesugi Ritsuko’s body, and Saku admitted he had lied about being the killer.
• Saku explained that he had gone to Uesugi Ritsuko’s room intending to kill her, but found her dead and discovered a button and hair that he believed belonged to Kisaki Eri.
• Saku confessed that he had moved the body and staged a locked room to take the blame and protect Kisaki Eri from suspicion.
• Kisaki Eri condemned Saku’s self-important sacrifice and insisted that she had not killed anyone, while the onlookers grew more suspicious of her.
• Mouri Ran asked Lin Xinyi about Uesugi Ritsuko’s cause of death, and Lin said his deduction suggested there might not have been a killer.