Naoto Watari is a second-year high school student who lives with his younger sister, Suzushiro, and his aunt. Since the loss of his parents, Naoto has prioritized his sister above all else. He ignores school clubs, part-time jobs, romance, and even refuses to socialize with his friends.
However, one day, Naoto's life suddenly changes when Satsuki Tachibana, his childhood friend, transfers to his school. Satsuki is the one who destroyed the precious garden they cared for together.
Satsuki's presence creates a storm for Naoto and those around him, and everything is slowly heading towards destruction…!?
