An unpopular NEET turtle who only thinks about her buttocks. - Her childhood friend, black girl Ranka, is extremely lonely, and she comes to Kames house almost every day to relax and kill her time as if it were her own home. - Kame didnt see Ranka as a member of the opposite sex, but she involuntarily got an erection in her buttocks, and Ranka saw her secretly jerking off. - Kame cant stand it and buries his face in her Rankas buttocks and ends up having sex with her childhood friend.