My younger brother, who is several years younger than me, is a sports prodigy and a handsome guy. Recently, he started bringing his cute girlfriend Rin home more often. As a brother, I'm sure he doesn't mean to show off. But as someone who isn't popular with the opposite sex, it just feels like bragging to me. One day, I accidentally caught my brother and Rin having sex…and before I knew it, I had recorded the scene, and that's how it all began…
