Kyouichi is a 25-year-old NEET who lives in his parents' house. When he isn't doing freelancer work, he has a side hobby - drawing erotic manga. His life is an ordinary one, which is precisely when things get crazy.
One day, while going to the bathroom, he sees a naked women in his bath. The woman, calling herself Sayo, asserts that this is her house, and demands to know who Kyouichi is. What is going on?
