Hajime and Rei are childhood friends who lived nearby each other. Though not officially boyfriend and girlfriend, both endured difficult family situations. Hajime grew up in a single-parent household with his father, who was abusive and obsessed with gambling. Rei lived with her mother, who became romantically involved with Hajime's father. Hajime's father eventually squandered all the money Hajime earned from part-time jobs and left with Rei's mother. Left with nothing and emotionally vulnerable, the two young teens found solace in each other, clinging together and repeatedly having sex to cope with their loneliness.