After Machika loses her lover Hatta Yukito, she’s visited by Sawako Fukai, Yukito’s former lover. By chance, Sawako ends up moving in with Machika, whose family welcome her. However, despite her cheerful and witty nature, Sawako’s occasional bewitching and madness spreads like poison to Machika’s family and their surroundings.

在恋人八田雪斗去世后音川茉香不知所措，雪斗的前女友音川佐和子突然出现，因为一次偶然两人住在一起，茉香家人开心欢迎佐和子，而佐和子不时展现出的妖艳与疯狂却侵蚀着茉香周围的人际关系。