Sawa is a game enthusiast and a ordinary office worker in her twenties. However, she has a younger childhood friend, Souta, with who she has an “unusual relationship”. Souta, who is more than a best friend but less than a lover, often comes over to her house. One day, on her way home from a high school reunion, she was approached by Aihara, who she had a crush on at the time. "Can I go over to your house?" Sawa brings him up to her house, and they have a physical affair. Sawa is at the mercy of multiple love affairs that are not healthy.

A modern girl and three handsome boys. Their hearts and bodies are shaken by the four-cornered relationship.