To make antibiotics, Senku and his kingdom need to obtain sulfuric acid from a fountain of the stuff. The team goes prepared, but there’s no guarantee that they’ll make it back alive.

Senku, Taiju and Yuzuriha head to Hakone to collect sulfur for gunpowder, which they’ll need to fight Tsukasa. They accidentally set off an explosion, which attracts some unexpected attention.

Kohaku shows Senku to her village, but it’s going to take some convincing before they let him in. In the meantime, he makes friends with a like-minded, promising “sorcerer.”

During the Bloody Halloween, Mikey ended up in a 1v3 fight against Kagetora with his limbs bound. After Kazutora hits him in the head with a pipe, Mikey ends up on his knees. The Valhalla members see this as a chance to finish off the Invincible Mikey and try to get to him. Draken and Takemichi try to save Mikey, but they're too far away. But then, a rather surprising person came to Mikey's aid.

During the Bloody Halloween, Mikey ended up in a 1v3 fight against Kagetora with his limbs bound. After Kazutora hits him in the head with a pipe, Mikey ends up on his knees. The Valhalla members see this as a chance to finish off the Invincible Mikey and try to get to him. Draken and Takemichi try to save Mikey, but they're too far away. But then, a rather surprising person came to Mikey's aid.

Takemichi returns to the present after shaking hands with Naoto and is reunited with Naoto who is now a police officer. Naoto asks Takemichi to go back in time and prevent the two leaders of the Tokyo Manji Gang, Sano Manjiro and Kisaki Tetta from meeting so that they can save Hinata. But what awaited Takemichi when he went back into the past 12 years were days spent as a slave to Kiyomasa, a member of the Tokyo Manji Gang.

Mob is challenged to a one-on-one fight with Black Vinegar Middle School's shadow leader, Hanazawa Teruki, otherwise known as Teru. Mob doesn't use his powers but Teru goes all out on him, destroying everything around him. Teru continues to unleash his incredible power when Mob suddenly remembers a tragedy that happened between him and Ritsu...

Mob is challenged to a one-on-one fight with Black Vinegar Middle School's shadow leader, Hanazawa Teruki, otherwise known as Teru. Mob doesn't use his powers but Teru goes all out on him, destroying everything around him. Teru continues to unleash his incredible power when Mob suddenly remembers a tragedy that happened between him and Ritsu...

A giant baby Nudenium is loose, Mr. Lewd Talk is friends with Handa's mother, and Mikazuki returns to Shin-Yokohama.

Natsume is accosted by a spirit who asks for her brother's name back. She says that both of them have come from the village of floating spring, a paradise sealed off from the land of men. Meanwhile, the local Youkai are happy that the local priest is no longer in his temple. Natsume worries for his friend Tanuma, the priest's son, but isn't sure what to say...

With the rest of his life moving along quite smoothly, Ryoma decides to take on more adventuring jobs to raise his adventurer rank. He visits Maylene at the Adventurer's Guild to discuss the next steps.

The laundry business explodes in popularity, so Ryoma rushes out on day two to hire more help. He meets Fei and Li Ling, foreigners with a hidden past.

With the business going more smoothly than Ryoma ever imagined, Ryoma is able to go back to studying his slimes and adventuring. He discovers several new types of slimes.

The dark spirit attacks Saitou and the others with powerful light magic. Even working together, it’s all the skilled adventurers can do to defend themselves. Then Saitou suggests a measure that could turn the seemingly hopeless situation around.