SYNOPSIS

”If you call me big brother， I'll let you cum.” Fumi， a college student， is 20 years old and has never had a girlfriend， so he decides to try out a dating app， and the person who shows up to meet him is Tomo， a handsome hunk. ”Fumi， does it feel good?” His long fingers tease his nipples and butt... He was satisfied physically and mentally， but it was just a one-night stand. One day， Tomo shows up as the son of Fumi's mother's boyfriend...!? A secret cohabitation love story begins with a playful， sweet， sadistic stepbrother and a naive， cute stepbrother!