In Shibuya, a group of men enjoy a night out drinking. Even after the last train has departed, they approach girls still partying, listening to their personal stories and struggles, with the ultimate goal of taking them home. This time, two men team up with 23-year-old Mizuki and 23-year-old Airi, heading to a seafood izakaya near Dogenzaka. At the first bar, they share a table with a woman who declares sex as "just a sport," proudly admitting she sleeps with multiple men in a single day—an impressive player. However, they part ways before moving to the next bar. Regrouping, they head to the second spot. Sipping on shikwasa sodas, they meet two older women: Mizuki, a returnee fluent in English, and Airi, a blonde hostess. They share wild stories—semi-nude photo shoots for hostess promotions, sex during hot spring trips with boyfriends, and orgies during study abroad days—fueling an increasingly heated night. The group of five—three men, two women—move to the next bar. They enter a restaurant famous for its motsunabe hotpot, where erotic talk intensifies. The topic: "First Masturbation." Mizuki reveals she experienced pleasure using her toes as early as age six. Airi confesses she’d tied together three cotton swabs and used them to masturbate in the bathroom since sixth grade. At this point, Airi’s boyfriend gets angry and breaks up with her on the spot. Now alone with the men, Mizuki heads to a love hotel. Popping open canned chuhai, they begin drinking in the room. As the night deepens and others fall asleep, a passionate tongue kiss begins with Mizuki. She eagerly reciprocates, tongues intertwining. Clothes come off, replaced by endless kissing and skin contact. The cock presented before her is immediately sucked with intense pleasure, and she rides on top, feverishly giving blowjobs. She jerks the shaft while performing repeated fellatio—clearly a blowjob enthusiast. Her thick bush hides a perfectly pink, glistening pussy. When spread open, it reveals a stunning salmon pink. Shiny, vivid lubrication glistens beautifully. "Ahh... Aaahhh!!" Fingers thrust and swirl inside, triggering a powerful gush of female ejaculation—so strong it soaks the neighboring bed. With her soaked pussy, she inserts a cotton swab and performs an exhibitionist masturbation. They then engage in 69, mutually licking each other’s genitals, culminating in full penetration. Alcohol surges through her body, turning every inch into an erogenous zone. High-pitched moans burst out uncontrollably. In the cowgirl position, she frantically grinds her hips, the bouncing motion of her large breasts driving everyone wild. She then grinds her pussy onto the man’s face, face-sitting for intense cunnilingus. Her clit and vagina are relentlessly licked, making her back arch involuntarily. They continue thrusting—on the bed, against the vanity mirror, then in the bathroom—repeating piston-like motions over and over. The scene ends with a cumshot blasting all over her face. The night of heavy drinking concludes with the returnee older sister, experienced in orgies, ignoring the last train, disregarding her boyfriend, and transforming into a depraved freak, completely obsessed with strange cocks.