Naoto Watari has had his share of struggles: his parents died two years ago, and now he and his sister live at his aunt’s house. There, his desire to protect his sister earned him notoriety as “the guy with the sister complex”—which never mattered to him, as his sister always came first. But when Satsuki, a childhood friend-turned-enemy(?), becomes his school mate, Naoto’s ordinary life is thrown into chaos … and Satsuki may just be the beginning.
Naoto received an unexpected love confession from Ishihara-san, the girl universally adored by his class. While it was supposed to be a happy occasion, Naoto couldn’t give her a definite reply because of his rocky relationship with his childhood friend Satsuki. Naoto doesn’t want to hurt anyone, be them his sister or his childhood friend. Just what will be Naoto’s reply to Ishihara-san’s confession?! Shortly after making another crucial decision, Naoto ran into a girl he seemed to have seen somewhere before!! Naoto thought that everything was going to work out, but now, his high school life is about to get shaken up even more.