Seiji Yamada is a 22-year-old shonen manga artist with ochre hair and brown eyes. He meets Sono Hanasaki, a fellow manga creator known for hentai, initially mistaking Sono for a woman due to his appearance. Despite discovering Sono is male, Yamada's romantic feelings endure, leading to an intimate relationship. Yamada is troubled to learn of Sono's past casual sexual encounters and emotional trauma from abandonment and exploitation, resulting in a temporary separation. After comprehending the depth of Sono's struggles, Yamada reconciles with him. Despite their ten-year age difference, Yamada actively shapes their relationship dynamics, frequently initiating intimacy. His journey as a manga artist and personal experiences drive his character development, centered on navigating the complex emotional and romantic challenges within this relationship.