Chapter Summaries

After the peace conference, Su Yang hid the details of his Sacred Gear from Asachel and warned him that someone among his subordinates might leak information. The story moved on to the final exams, giving Su Yang time to study without interference from Kisesu Itsuo and Diorio.

• Su Yang stroked Irina’s wings, and Gabriel accepted his claim that the touch was a custom between childhood friends.
• After the meeting, Asachel asked Su Yang whether the object on his chest was a Sacred Gear and what it could do.
• Su Yang named it the Sacred Heart of the World Dragon but refused to reveal its abilities, warning that Asachel’s subordinates might leak information.
• Asachel considered whether Su Yang’s warning meant there was a mole among the God’s Child Monitors.
• When the final exams began, Su Yang studied after Kisesu Itsuo and Diorio left him undisturbed.

Su Yang comforted Aisha about her final exam and met Cao Cao, who had come to deliver Jeanne. Jeanne reunited with Su Yang, while Cao Cao left determined to earn Su Yang’s recognition.

• Aisha worried about the final exam, and Su Yang reassured her that she would pass.
• Aisha prayed to Su Yang for better grades, and Su Yang received a trace of her faith.
• Su Yang recognized Cao Cao at the school gate and accused him of using Georg to eliminate rivals within The Khaos Brigade.
• Cao Cao said he had come to deliver someone, and Jeanne emerged from the mist and embraced Su Yang.
• Cao Cao left, declaring that he would do something to earn Su Yang’s recognition.

After Cao Cao vanished, Su Yang explained Jeanne’s situation to Aisha and began his exams. He completed a sign-in by securing first place, earning an Academic God Halo that increased his learning efficiency tenfold.

• Cao Cao disappeared into the red mist, and Su Yang told Aisha that Jeanne would be moving into their home.
• Su Yang triggered a Silver Plot Sign-in that challenged him to claim first place in the exam.
• Xenovia asked Su Yang for help with the exam, and he told her to meet him in the sports equipment storage room afterward.
• Su Yang finished his exams with ease and handed in his paper before the other students were done.
• Su Yang completed the sign-in and received the Academic God Halo, which raised his learning efficiency to 1000% of its original level.

Su Yang met Xenovia in the sports equipment storage room after they both finished their exams early. Rias and Sona separately searched for them, and Su Yang ran into one of their assembled search party when he came out.

• Su Yang waited for Xenovia and led her into the sports equipment storage room, where he set up magic formations.
• Sona Sitri and Rias Gremory handed in their exams early and arrived outside Su Yang's classroom, where they learned he had already left.
• A girl at the classroom door told Sona and Rias that Xenovia had also handed in her exam early.
• Sona and Rias split up to search for Su Yang, bringing their Servants into the search parties as they found them.
• Su Yang emerged from the storage room after about an hour and immediately encountered a member of the search party.

Su Yang joined Akeno Himejima on her way to the Occult Research Club, where Asachel told him Sirzechs had called him to a meeting with the Underworld’s higher-ups. Su Yang realized they intended to challenge his authority as captain of the Protector Squad and resolved not to back down.

• Akeno Himejima found Su Yang outside the sports equipment warehouse and invited him to spend time together, but he coughed up golden blood to distract her from going inside.
• Akeno Himejima escorted Su Yang to the Occult Research Club, where they found Asachel working at Rias’s desk.
• Asachel told Su Yang that Sirzechs had summoned him to a meeting of the Underworld’s higher-ups and said their stance must not change or retreat.
• Asachel explained that Blade Dog and Joker had avoided the meeting by claiming they were on missions, and that the higher-ups might target Su Yang’s authority as captain of the Protector Squad.
• Su Yang understood that the higher-ups wanted influence over the Protector Squad and decided he could not show weakness before them.

Su Yang learned that his enemies underestimated his strength, secured Asachel’s support to deal with them, and advised him on how Issei could overcome Juggernaut Drive’s drawbacks. A Gold-level sign-in then directed Su Yang to find Ingvild Leviathan within 180 days, but he did not know where she was.

• The Divine Child Watchers’ allies judged Su Yang to be no stronger than a Low-tier Demon Lord and planned to target him, overlooking his hidden strength and rapid growth.
• Su Yang asked Asachel whether Sirzechs would support him if he dealt with the people targeting him, and Asachel confirmed that the Satans would back him as long as he did not wipe them out completely.
• Su Yang asked about Issei’s training and Vali, and Asachel said Issei could use Juggernaut Drive but still suffered its side effects while Vali’s whereabouts were unknown.
• Su Yang told Asachel that Issei could dispel the resentment of Juggernaut Drive’s predecessors through his convictions and dreams.
• Su Yang triggered a Gold-level sign-in for Ingvild Leviathan and realized he had 180 days to find her, though he did not know where she was.

Rias took Su Yang to the Underworld, where Grayfia registered his identity and measured his power at the level of an Ultimate Devil. Sona set out to find him, while Grayfia left disappointed that his strength did not meet her expectations.

• Rias and Akeno took Su Yang to the Underworld, and Asachel watched them leave with a nostalgic gaze.
• After Tsubaki told Sona that Su Yang had gone to the old school building, Sona decided to take her Servants to the Underworld train to find him.
• Su Yang contacted Aisha and Amano Yuma to tell them he would be staying in the Underworld for a while.
• Grayfia met Su Yang aboard the Underworld train and registered his entry by having him channel his Spiritual Power into a Magic Circle.
• The Magic Circle revealed power at the level of an Ultimate Devil, and Grayfia concealed its radiance before leaving after completing Su Yang's registration.

Rias took Su Yang to the Underworld and explained that the Four Great Satans were building a vast array led by Ajuka. As they approached Gremory territory, Sona joined them and reminded Su Yang that he had promised to visit her home too.

• Rias told Su Yang that Magic Circles would let him freely travel to and from the Underworld.
• Su Yang examined the Underworld Great Array, recognized Vishnu's power at its core, and decided to ask Ajuka for the formation.
• Rias said the Four Great Satans had gathered magic and formulas from Devil families to build the array, which could resist the God of the Bible once completed.
• Rias prepared to take Su Yang to meet her parents in Gremory territory.
• Sona arrived on the Underworld train after delegating Student Council work to Tsubaki Shinra and said she had come to find Su Yang.
• Sona reminded Su Yang of his promise to visit her home, and Su Yang assured her he would keep it.

Su Yang arrived in Gremory Territory with Rias and Sona, where Rias’s parents welcomed him. After dinner, Grayfia summoned him to meet Sirzechs about future matters, while Su Yang received a sign-in mission targeting Grayfia’s twin ponytails.

• Rias invited Sona to her house, and Sona accepted; Su Yang agreed to visit after the young generation’s gathering.
• Su Yang’s group arrived in Gremory Territory and received a celebratory welcome from a maid squad.
• Rias’s parents greeted Su Yang, and Venerana also welcomed Sona.
• After dinner, Grayfia told Su Yang that Sirzechs wanted to see him about future matters.
• Su Yang accepted Grayfia’s request to follow her, despite being distracted by a Gold-level sign-in mission involving her twin ponytails.

Su Yang spoke with Grayfia before meeting Sirzechs to discuss his Protector Squad. Sirzechs said the squad needed more members, though Diorio and Kisesu Itsuo had completed their missions with ease.

• Grayfia escorted Su Yang through House Gremory's castle and offered to arrange etiquette teachers for him.
• Su Yang suggested Grayfia try twin tails, and she lingered outside Sirzechs's office considering the hairstyle.
• Su Yang met Sirzechs and asked to call him brother-in-law, which Sirzechs accepted.
• Sirzechs discussed preserving the Devil bloodline while Su Yang's Protector Squad dealt with its enemies.
• Sirzechs told Su Yang it was time to recruit squad members because Diorio and Kisesu Itsuo lacked enough capacity to handle everything.

Su Yang discussed expanding the Protector Squad with Sirzechs and chose a representative from each faction. He named Sairaorg Bael and Rinte Seran, then revealed Vali as his Fallen Angel candidate.

• Su Yang said new Protector Squad members would have to pass his screening, and he offered to deal with opponents who obstructed the alliance.
• Sirzechs gave Su Yang candidate lists for the Angel and Fallen Angel sides, but Su Yang said he had already chosen his recruits.
• Su Yang explained that he had selected Sairaorg Bael for the devil side because he wielded the Lion King's Battle Axe and had hidden strength.
• Su Yang named Rinte Seran as his Angel candidate, and Sirzechs wondered whether he was meant to balance Diorio's combat ability.
• Su Yang named Vali as his Fallen Angel candidate.

Su Yang and Sirzechs agreed that Su Yang would bring Vali back from the Khaos Brigade. A few days later, Su Yang traveled to Luciferad with Diorio and Kisesu Itsuo for Underworld meetings, where his sign-in earned him Gabriel's Halo (Mutated).

• Su Yang proposed bringing Vali back, and Sirzechs agreed to the plan.
• A few days later, Rias and Sona's Servants arrived in the Underworld after settling matters in the Human World.
• Su Yang traveled toward Luciferad with Diorio and Kisesu Itsuo, reminding them they were there for official business.
• Su Yang completed a Bronze Location Sign-in at Luciferad and received Gabriel's Halo (Mutated).

Su Yang met with Ajuka at the conference hall and asked to borrow the unfinished Underworld Great Array so he could study its construction. Ajuka handed over the array materials, leaving Su Yang free to examine them.

• Su Yang entered the conference hall with Kisesu Itsuo and Diorio, who teased him about finally working, and he struck them with lightning.
• Su Yang greeted Ajuka, whose smile turned worried when he recognized Su Yang’s familiar grin, and led him somewhere quiet to talk.
• Su Yang asked Ajuka for the Underworld Great Array, which Ajuka was building with materials made from Vishnu’s body.
• Ajuka warned Su Yang that he lacked foundational knowledge, but Su Yang insisted he only wanted to study the array and draw inferences from it.
• Ajuka retrieved the array materials from an Exotic Space and gave them to Su Yang.

Su Yang evaded Ajuka’s attempt to introduce him to several Astaroth princesses and headed to the garden, where he met Sairaorg. He revealed that he possessed Battle Qi even purer than Sairaorg’s, and Sairaorg recognized that Su Yang had been hiding his strength.

• Su Yang pretended that Rias was calling him so he could leave before Ajuka introduced him to the Astaroth princesses.
• Su Yang headed toward the small garden to study the information he had obtained.
• Sairaorg introduced himself as Rias’s cousin and mentioned that Su Yang had stolen her away.
• Su Yang showed Sairaorg his Battle Qi, which Sairaorg recognized as more powerful and pure than his own.
• Su Yang told Sairaorg he was interested in him, and Sairaorg acknowledged Su Yang’s hidden strength.

Su Yang invited Sairaorg to join the Protector Squad and tested him with a fistfight after Sairaorg accepted. Su Yang threw a serious punch at Sairaorg, leaving the outcome of the fight unresolved.

• Su Yang triggered a sign-in plot requiring him to win a fistfight against Sairaorg within one day.
• Su Yang invited Sairaorg to join the Protector Squad, and Sairaorg asked about the team's God-Killing Weapon users and Su Yang's rumored Apocalypse ability.
• Sairaorg eagerly accepted the invitation, hoping the squad would help him build the strength and connections he needed to become a Demon King.
• Su Yang said Sairaorg had to earn his approval by holding his ground in a fistfight, and Sairaorg prepared himself with Battle Qi.
• Su Yang threw a Serious Punch that tore through the air with a sonic boom.

Su Yang defeated Seraog in a fist clash, passed him, and gained an enhanced Spiritual Power trait. After returning to the gathering, Su Yang found Seraog had already defeated a thug-tier devil, whose Servants stepped forward to challenge him.

• Su Yang struck Seraog hard enough to injure him, then told him he had passed.
• Su Yang completed the plot sign-in and upgraded Absolute Calculation into Absolute Calculation Auto.
• Su Yang considered giving the new trait to the Magic Circles inside his body, then received Grayfia’s message that the meeting was about to begin.
• Su Yang returned to the venue and saw a thug-tier devil fly through a hole in the wall.
• Seraog emerged and warned the defeated devil, prompting the devil’s Servants to step forward angrily.

Su Yang arrived at a meeting of the devil leadership after dealing with the young devils’ conflict and reuniting with Rias. Grayfia seated him in a vacant place beside the Four Great Satans, leaving the other attendees shocked that a human had been given such a position.

• Sairaorg stopped punishing the young devils and told them to treat their injured masters before the important event.
• Rias threw herself into Su Yang’s arms, and he greeted Sigerre Agarez before heading to the meeting.
• Grayfia escorted Su Yang into the tower, where he observed the attitudes of the assembled leaders and exchanged glances with Serafall, Ajuka, and Falbion.
• Grayfia led Su Yang to the fifth vacant seat on the top level, prompting an uproar because only the Four Great Satans had sat there before.
• Sirzechs smiled at Su Yang and said he would be counting on him, and Su Yang agreed.

Su Yang used Krishna to assess the Underworld’s leaders and triggered a sign-in task to intimidate its upper echelons. At a gathering for young devils, Sairaorg revealed he had joined Su Yang’s Protector Squad, shocking the assembled leaders.

• Su Yang activated Krishna’s avatar to read the thoughts of the Underworld’s upper echelons and received a Gold sign-in task to intimidate them within one day.
• Sirzechs began the official proceedings and Grayfia brought in the young devils and their Servants.
• Sirzechs said he preferred not to send young devils to fight the Khaos Brigade, but Sairaorg argued that he should be allowed to serve.
• Sairaorg revealed that he had joined Su Yang’s Protector Squad, prompting the upper echelons to react with disbelief and jealousy.

At the Underworld gathering, Sirzechs warned Seraog against joining the Protector Squad while he was still young, then invited the young devils to share their ambitions. Seraog and Sona described plans to reshape the Underworld, and the chapter left off as the old devils reacted to Sona’s proposal with laughter.

• Sirzechs told Seraog that sending him into battle while he was still growing would put the new generation at risk, and Seraog reluctantly accepted the warning.
• The Four Great Satans discussed their outlook for the Rating Game while Su Yang listened and continued constructing the system within his body.
• Seraog declared that he wanted to become a Satan and said he would use his position to make the Underworld more hopeful.
• Sona said she wanted to establish a Rating Game school open to Low-class Devils and reincarnated devils, without discrimination.
• The old devils mocked Sona’s ambition, while Su Yang and the Four Great Satans looked on approvingly.

Su Yang intimidated the old-era Devils who opposed him, allowing Sona to continue presenting her dream of opening an educational institution for Low-class and Reincarnated Devils. Sairaorg and Rias publicly supported her, and the gathering began to discuss the proposal.

• Su Yang struck an old-era Devil with a Golden Sword that erased his demonic power, then stopped another Devil's time and struck him down when he challenged him.
• Su Yang warned the gathering to keep order, and Sona continued explaining that establishing an educational institution was her lifelong goal.
• An old-era Devil argued that Low-class and Reincarnated Devils should serve High-class Devils and claimed Sona's plan threatened the traditions of noble families.
• Sairaorg endorsed Sona's dream, saying that hope for Reincarnated Devils who were not Pure-blooded Devils was essential to the Underworld's future.
• Rias also voiced her support for Sona, and Devils in the lower tiers began discussing the proposal.