In pursuit of his dream to become an action manga artist, 20-year-old Aihara Minoru journeys to Tokyo. Luck shines upon him as he secures a job as the live-in assistant to his beloved mangaka, Takakura Kenji, the renowned creator of 'Ultimate Banchou.' However, upon stepping into his new role, Aihara is taken aback to find that Takakura Kenji is not the tough figure he envisioned, but rather Sekai Ichiko, a girl his age embodying a moe character persona. Struggling to overcome his initial disappointment, Aihara faces the challenge of proving his artistic prowess to the unconventional mangaka.