Kenji lent a shoulder to Tomoko, a college student living in the same apartment building, when she was unable to move on the stairs. A few days later, on his way home from drinking with a colleague, Kenji happened to run into Tomoko in town, and they decided to drink together at Kenji's house. Tempted by Tomoko, Kenji couldn't hold back and had sex with her right next to his colleague, who was passed out drunk. Seeing this, Kenji's younger brother approached, wanting to taste those massive boobs for himself...