When Hanako Mashimoto-the beautiful daughter of a tech empire-is found dead in the stairwell of her elite private school, her closest friend Makoto Tadashi is left shattered. As the only scholarship student in a world of privilege and secrecy, he becomes the reluctant center of a tragedy no one can explain. Haunted by guilt and loss, Makoto withdraws from life, plagued by memories of their last conversation and the image of her lifeless body. But during a trip to Kyushu's countryside to recuperate, Makoto meets an unlikely ally and finds himself pulled into a mystery far darker than anyone suspects. As Makoto begins his search for answers, he uncovers a truth that might be better left hidden.