Childhood friend Miyotsuki (21) and Shou (25) go to Shou's hometown for job hunting. In contrast to his warmly welcoming father, Kouzou (66), Miyotsuki learns the reality that his brother, Satoru (36), is a hikikomori. The next night, while Shou is away, Miyotsuki, who had a bad interview, drinks with Kouzou. Soon after, Kousuke carried the sleeping Mikizuki to her bedroom and couldn't resist her voluptuous body, ending up raping her. Her brother Satoru had been watching it all from the darkness—.
