Shiranui Natsume is a third-year high school student with a face that frightens almost everyone he meets. His childhood friend and girlfriend, Minazuki Natsume, is the exact opposite: dignified, cool, and always ready to help anyone in need. Whenever Shiranui finds himself in trouble, she rushes to his side. Whenever he loses his way, she shows him the path. He admires her deeply and wants to become a true hero for her, just as she has always been for him. Set in a typical Japanese high school, the story follows Shiranui's daily efforts to grow stronger, more reliable, and more confident, all while deepening his bond with Minazuki. Along the way, they navigate school events, friendships, and the quiet challenges of young love. Notable arcs include their participation in sports festivals, class trips, and holidays, each offering moments for Shiranui to prove himself and for Minazuki to show her unwavering support. The narrative focuses on the couple’s mutual growth and the tender, sometimes comedic, process of learning to lean on each other.