An actor misses the last train at Shinjuku Station and approaches a girl with the offer to cover all drinking expenses, successfully finding his companion for the night on his second attempt. Today's partners are Sena and Nozomi, drinking buddies who enjoy a night out. Sena is dating the CEO of an IT company, but she's actually a married woman who secretly enjoys a sexual relationship with him—traveling overnight under the guise of business trips and playing with vibrators together at the office. She also has a doctor boyfriend and indulges in erotic roleplay, dressing up as a female physician at the hospital. Though she meets her boyfriends one or two times a week, she still feels unsatisfied and masturbates daily. Her masturbation habit includes using a vibrator during rush hour when pressed against men on crowded trains, then finishing in station restrooms. After paying the bill at their second bar, the actor and Sena head to a hotel. As the mood turns erotic, Sena suddenly disappears into the bathroom. When the cameraman checks, he finds her masturbating with a vibrator while watching AVs. When shown his large cock, Sena immediately latches onto it, giving a sloppy, noisy blowjob. Her skilled oral brings him to climax quickly. She then strips off her slutty dress, revealing her big, full breasts, and begins titty-fucking, squeezing his thick cock between them. Drooling, she sucks on his balls before he thrusts his wet, saliva-soaked cock into her dripping pussy. She squeals cutely, convulsing in pleasure. They passionately fuck in various positions, finally ending with him cumming all over her pretty face. Having to return home due to work, Sena leaves unsteadily, her legs shaky from the intense sex, stumbling down the road.