Chapter Summaries

Senku's group put sulfuric acid extraction on hold after learning the village tournament was the only way to obtain supplies for antibiotics, and they entered the contest as a team. With two weeks to prepare, the group trained while Senku trusted Kohaku to win and Li Xiang worked on an unspecified plan.

• Senku decided to handle the dangerous sulfuric acid extraction himself, but Li Xiang argued that he should not risk his life.
• Kohaku announced that the village martial arts tournament would begin in half a month and that its winner would control the village's resources.
• Li Xiang postponed sulfuric acid collection, and Senku's group signed up for the tournament after Li Xiang persuaded Gen Asagiri to compete in exchange for a wish.
• Maguma watched Senku's group with hostility after registration, marking himself as their chief rival.
• The group began half a month of training; Kinro and Ginro practiced together, Kohaku looked after her sister, and Senku relied on her strength instead of training.
• Li Xiang tinkered with something while Watermelon kept watch over Homura.

Senku built a crude hand-cranked generator while the village prepared for the tournament, and Maguma watched the outsiders with growing hostility. The opening round ended with Maguma, Senku, Kohaku, and Li Xiang advancing, as Li Xiang hoped to face Maguma next.

• Senku completed a hand-cranked generator, and Li Xiang warned Ginro and Kinro to guard Homura and watch the perimeter after she noticed Maguma spying on them.
• The tournament draw paired Kinro with Maguma, Kohaku with Ginro, Gen Asagiri with Senku, and Chrome with Li Xiang.
• Maguma exploited Kinro's poor eyesight to defeat him, while Gen Asagiri surrendered immediately to Senku.
• Kohaku worried that Watermelon had gone missing, but Li Xiang reassured her before she defeated Ginro.
• Chrome surrendered to Li Xiang after a brief, staged exchange, and Li Xiang hoped to draw Maguma in the next round.

Li Xiang defeated Maguma in the semifinal by exploiting his lowered guard, while Kohaku conceded to Senku. Li Xiang then conceded the final to Senku, making him champion of the Ishigami Village tournament and leaving him standing atop the arena as the villagers celebrated.

• The semifinal matchups were announced as Senku versus Kohaku and Li Xiang versus Maguma, disappointing Senku’s team.
• Li Xiang dodged Maguma’s attacks, tricked him into dropping his guard, and struck his vulnerable weak point before dragging him out of the arena to win.
• Kohaku conceded to Senku, setting up a final between Senku and Li Xiang.
• Li Xiang conceded the final, and the referee declared Senku the tournament champion.
• The villagers cheered for Senku while whispering about the dishonorable path to his victory, but Li Xiang said their goal had been results.

Senku became the Village Chief and immediately declared his marriage to Ruri over once he had secured the supplies he needed. Li Xiang secretly cared for the prisoner Homura, then reviewed her memories of arriving in Ishigami Village and reflected on the coming effort to cure Ruri.

• Senku won the tournament, became Village Chief, and announced that he would divorce Ruri immediately after agreeing to marry her.
• Gen Asagiri lamented Senku's bluntness as Senku collected the brewing supplies and turned to his research.
• Li Xiang brought Homura warm food, assured her she meant no harm, blocked the draft, and left a thick quilt in her hut.
• Li Xiang watched the system footage of her journey with Senku, recalling how they joined Ishigami Village and diagnosed Ruri's lung disease.
• Li Xiang recognized that Senku's new position brought Ruri's cure within reach, then questioned whether she was truly gentle.

Li Xiang tried to help the team overcome the danger of obtaining sulfuric acid, then found a possible alternative after Little Watermelon led her to poisonous mushrooms. She considered using their toxins against Tsukasa's group and reasoned that montmorillonite powder could treat the resulting diarrhea.

• Li Xiang persuaded Gen Asagiri to win Homura over by offering him cola.
• Senku and old Fossil made a gas mask, but Li Xiang worried that gathering sulfuric acid would still endanger Senku and Chrome.
• Little Watermelon brought Li Xiang to a clearing of colorful mushrooms, and she warned him that they were poisonous.
• Li Xiang realized she could extract the mushrooms' toxins and secretly put them in Tsukasa's group's food or water.

Gen persuaded Homura to remain neutral, while Senku and Chrome prepared to gather sulfuric acid. Li Xiang and Kohaku rushed to warn them of an ambush, but Hyoga’s warriors blocked the mountain pass and Hyoga threatened to kill Senku.

• Gen visited Homura and persuaded her to stop fighting both sides, though she refused to become an ally.
• Senku and Chrome prepared gas masks and set out to collect sulfuric acid in the mountains.
• Kohaku sensed an approaching group, and Li Xiang took her to warn Senku and Chrome while Gen stayed to guard camp.
• Li Xiang and Kohaku caught up with Senku and Chrome at the mountain pass, where Hyoga and his warriors blocked their way.
• Senku taunted Hyoga, who declared that killing Senku would remove every obstacle.

Li Xiang and Senku’s group escaped Hyoga’s attack by climbing a tree beside the sulfuric acid pools, forcing Hyoga’s men to retreat when Li Xiang warned them about the toxic fumes. The five of them were left trapped in the tree with only three gas masks as poison mist spread around them.

• Hyoga confronted Li Xiang and threatened to capture her, while she insulted him and the Bald-Headed Strongman.
• The Bald-Headed Strongman charged at the group, but Kohaku knocked him down and Li Xiang continued taunting their opponents.
• Senku and Li Xiang signaled the group to flee, and Kohaku held off the attackers while they retreated into the forest.
• The group reached the sulfuric acid pools and climbed a tree to escape the pursuing Hyoga and his men.
• Li Xiang warned Hyoga that toxic fumes could poison his men, and Hyoga ordered them to retreat.
• Senku, Chrome, Kohaku, Li Xiang, and Ginro remained trapped above the acid pools with only three gas masks as the poisonous mist spread.

Li Xiang gave her gas mask to Ginro and leaped across the dangerous gap to safety with Kohaku’s help. She left Senku, Chrome, and Ginro to collect sulfuric acid, while Ginro watched her with renewed awe and guilt.

• Kohaku, Senku, Chrome, Li Xiang, and Ginro weighed how to escape the sulfuric acid pool with only three gas masks as the wind spread toxic fumes.
• Li Xiang gave the last intact gas mask to Ginro and said she would jump across with Kohaku.
• Kohaku cleared the gap and urged Li Xiang to jump, while Senku warned that the distance was too dangerous.
• Li Xiang leaped from the tree, and Kohaku caught her safely on the other side.
• Li Xiang told Senku, Chrome, and Ginro to collect the sulfuric acid, then encouraged Ginro to help them as he struggled with his feelings about her bravery.

Ginro overcame his fear and saved Senku as the team collected natural sulfuric acid. Senku and Chrome used it to complete the antibiotic for Ruri, leaving her illness treatable.

• Senku, Chrome, and Ginro descended into the poisonous mist to collect natural sulfuric acid, while Ginro found the courage to join them.
• When Senku slipped near the acid pool, Ginro grabbed his collar and pulled him to safety.
• Kohaku brought the exhausted Li Xiang back to Ishigami Village, where she and Gen waited for the others.
• Senku, Chrome, and Ginro returned safely with containers of sulfuric acid, the last ingredient needed for the antibiotic.
• After three days of work, Senku and Chrome completed their first antibiotic, giving them a way to treat Ruri's lung disease.

Li Xiang, Senku, and Chrome safely tested and administered the antibiotic, and Ruri recovered completely. With Tsukasa’s next move looming and their allies unreachable, the group decided to build telephones and a cross-regional communication network.

• Li Xiang used Grandpa Fossil’s handmade syringe to give Ruri an antibiotic skin test, which showed no allergic reaction.
• Li Xiang prepared an oral antibiotic dose for Ruri, and she took it without discomfort.
• Over the following days, Ruri’s infection cleared, and she regained her health.
• Li Xiang and Senku recognized that Tsukasa might act while their group remained cut off from Taiju, Yuzuriha, and the others.
• Gen Asagiri suggested making a telephone, and Senku and Li Xiang agreed to build a cross-regional communication network.