Sato works at a "black company". Every day he has to work from early morning to the next morning, with no time to sleep, so he never thought about having a girlfriend. Suzume is Sato's neighbor, she is very kind, always caring and attentive to Sato, even cooking food to supplement his nutrition. However, Suzume is quite "liberal" in her way of dressing, always wearing revealing clothes that expose sensitive areas in front of Sato. Every time he meets Suzume, he has to try hard to control himself. But one day, while taking a food container back to Suzume, Sato suddenly hears her scream. Suzume rushes out of the house and hugs him tightly. It turns out there was a cockroach in the house, and Suzume, frightened, asks Sato to help her deal with it. So both of them go inside to find where the cockroach is hiding. While searching, Suzume keeps showing off her beautiful curves in front of Sato. Unable to control himself any longer, he crosses the line. Suzume doesn't seem angry, on the contrary, she responds and goes along with him. And from that moment on, his life has changed...