Koizumi Hinata's first slut + Ryo work.Hinata, a girl who has been resented by her lewd teachers because she helped a girl who was being lewd on the commuter bus.Days of merciless rape while sweating in a packed car where the air conditioner breaks and you get choked with heat... The humiliation of involuntarily incontinence even though your body should be rejecting it.At the end, it will be covered with sperm in a group Ryo ●.