Seeking encounters through SNS or street pickups takes time and often ends in failure. Instead, a far more efficient method is asking your promiscuous friend to introduce you to some horny girls—leading to sex much faster. The ultimate goal of this project is to meet a true sex goddess. This time, the previous girl, Miyu, introduced us to Mio, an 18-year-old just out of high school—the youngest slut in the series! Though she looks youthful and innocent, she's actually a wild, experienced girl whose erogenous zone is her nipples. She's extremely sensitive to nipple stimulation—so much that even the friction of clothing against them turns her on. Her usual way of relieving sexual tension? "Chikunii" (nipple masturbation)! In the past, she'd moan uncontrollably, but now she's learned to enjoy it quietly without drawing attention. We rush back to the spot and have her demonstrate her technique. Moving a short distance away from us, she starts in front of Shinjuku Station. Soon, her body jerks in spasms, and when she returns, she's excited, pleading, "It's bad... I need to get back to the hotel now!" We dash back and the moment we enter the room, sex begins. Mio starts sucking the cock while playing with her own nipples. Using her gorgeous big tits, she performs expert titty-fucking and nipple handjob techniques—skills so advanced they're unbelievable for an 18-year-old, driving us wild. Unable to hold back any longer, we thrust our rock-hard cock into her soaked pink pussy. Even as we pound her hard with intense thrusts, she begs, "Play with my nipples too!" An incredibly greedy, pleasure-obsessed slut! Finally, we finish by shooting a heavy load of cum all over her cute pink nipples.