Hajime and Rei were childhood friends who lived next to each other. They weren't boyfriend and girlfriend, but neither had a good home life. Hajime was from a single-parent household; his father was violent and a gambling addict. Rei was also from a single-parent household; her mother was promiscuous and had an affair with Hajime's father. Hajime's father took the money Hajime earned from his part-time job and left with Rei's mother… The two vulnerable children were left alone. With no money or anything else, they clung to each other and had sex constantly in the empty house, but…
