It's April 1956, 18-year-old Ishinomori Shotaro (Nakajima Kento) graduated high school with dreams of becoming a manga artists. After graduating he moves from Miyagi Prefecture to Tokyo. His older sister Yoshie (Kimura Fumino) was seeing him off, asking him to do what he likes. Yoshie being the only one in his family to support his dream, and encouraged him to start drawing manga.

This story follows the semi-autobiographical account of manga artist Ishinomori Shotaro, author of the original Kamen Rider, Cyborg 009, and Super Sentai.