Yuji Fujiwara lived an unlucky life. When he was oo, he was blamed for a vase he didn't break, he was even fired from his job for a co-worker's mistake. At the convenience store where he works part-time, Takamiya, a younger girl, blames him for mistakes made by others. When he returns home feeling down, he is greeted by a strange girl. The girl reveals her true identity to Yuji who is confused. She said she is a slimy creature that had been living with him for three months. The creature, which can speak human language and change its appearance, has a fondness for Yuji. Yuuji is curt about the kindness from the slime life form. In order to attract Yuji's attention, the slimy life form changes her appearance to Takamiya, his colleague at his part-time job and seduces him.