I missed the last train after a drinking party and was in trouble, so a kind classmate of mine secretly let me stay at her university's women's dormitory, even though boys aren't allowed there. Then, late at night, a horny girl climbed on top of me and we decided to have sex even though my roommate was sleeping right next to me! But it would be dangerous if we were found out, so we had silent sex, suppressing our voices! I was excited by the slow piston-like movements while we were in close contact! What's more, my roommate, who was excited after seeing us having sex, called me later...