Satoshi visits the home of his high school classmate, Kyoosuke, and instantly falls for Kyoosuke's mother, Ayako—a beautiful and gentle woman. Deeply moved by the warm, loving bond between mother and son despite their poverty, Satoshi asks Kyoosuke to let Ayako come work as a housekeeper at his own home. However, his relationship with Ayako gradually grows complicated. Satoshi's possessiveness intensifies each day, as he becomes obsessed with making Ayako his completely. A story unfolds where love, obsession, and raw desire intertwine.