After a teacher is tragically murdered by a student, the media masks the culprit as 'Boy A' due to his young age. Unveiling the true identity as Takashi Ogura, a seemingly cheerful student with a hidden past, the story delves into the dark secret he harbors. Takashi's actions, sparked by a dark incident involving his childhood sweetheart, lead to a harsh reality he must bear in silence. Released from a correctional facility after three years and living under a new identity, he faces the weight of his past haunting his present. As he grapples with the consequences of his actions, the looming question remains—will Takashi forever be defined by the shadows of his past as Boy A?