Hump Bang! - Episode 1

Neighbors Koji and Hiro share a relationship that Koji claims is that of "childhood friends," a status he believes entitles him to "freebie sex." Hiro denies this, noting they've only known each other two years. Koji reveals he was masturbating because he heard Hiro masturbating in the next house. Hiro admits she was masturbating earlier while thinking of Koji and sucking on her own breasts. The two have anal sex in Koji's kitchen, followed by vaginal sex in his living room, with Koji cumming inside Hiro both times. The next morning, Koji's mom notices Hiro's fatigue, and his sister Rin teases Koji about Hiro being his future bride.