Ep. 7: Senku meets Chrome and decides to help him create an antibiotic for Ruri
Aired on August 16, 2019

Kohaku brings Senku to her village, introducing him to guards Kinro and Ginro, as well as a sorcerer named Chrome. Despite Chrome’s unsuccessful attempts to demonstrate magical superiority, Senku recognizes his independent progress and accepts him as an apprentice. Upon discovering that Chrome pursued sorcery to assist Kohaku’s frail sister, Ruri, Senku shares knowledge of the world from 3,700 years ago. He then commits to helping Chrome develop an antibiotic treatment to cure Ruri’s illness.
Episodes
- Ep. 3 · Senku crafts gunpowder at a hot spring while pursuing Tsukasa to Hakone.
- Ep. 4 · Senku faces Tsukasa's ultimatum after creating gunpowder and spotting distant smoke.
- Ep. 5 · Senku's apparent death leads to an explosive escape and his subsequent revival.
- Ep. 6 · Senku Revives and Spies Infiltrate Tsukasa's Army While Rescuing Kohaku
- Ep. 7 · Senku meets Chrome and decides to help him create an antibiotic for Ruri
- Ep. 8 · Senku and allies seek antibiotic elements with Suika's help to create iron and ramen.
- Ep. 9 · Senku uses magnets to create a generator and lightbulb while Gen Asagiri observes.
- Ep. 10 · Gen survives Magma's attack and trains for the Grand Bout with Kohaku.
- Ep. 11 · Senku crafts glasses for Suika using quartz sand and glass