My Pet Oniisan

Yuuta, a virgin boy, is overjoyed to be living with Haru, a sex pet. Yuuta thinks, "As long as Haru is here, it's okay even if we can't have sex yet." Meanwhile, Haru, who became a pet in order to survive, tries to fulfill his duties as a pet by inviting Yuuta to have sex. However, Yuuta, who realizes that Haru is actually afraid of sex, suggests, "Let's get used to it little by little together." The two of them proceeded to practice having sex while still fully clothed...