A friendly college couple living together abstains from sex for one month! Just as they are about to have sex when they are at the limit of their patience, a big-dick AV actor appears! After her first threesome, a female college student's sexual desire is heightened. We thoroughly examine whether she feels more from her boyfriend's dick or the actor's dick! Although she is embarrassed and shy about the sudden threesome, she moans cutely when she is with her boyfriend's dick! She climaxes in front of the intense pistoning of a huge cock! She forgets about her boyfriend's existence and gets cuckolded by the AV actor! A wild, hard-pistoning sex!