I had been drinking for the first time in a while at the new employee welcome party, and before I knew it, I had missed the last train. Then, new employee Riho called out to me, "Senpai...would you like to stay at my house?" I have a girlfriend, and I was just trying to kill time until the first train... My reason collapses when I see her breasts in her loungewear! Even though she called me on video, she gives me a titjob in a place where she's not visible! The guilt makes my dick even harder! I squeeze her big tits and have sex with her, cumming inside her many times!