High school girls on a school trip arrive at a countryside inn. At this sensitive age, the innocent girls eagerly try to learn things that are never taught in school! They encounter a man by chance in an open-air bath and are fascinated. Seeing a penis for the first time, they get incredibly excited, wriggling their small, cute bodies while saying things like "Can this really go in?" as they touch and lick, having a blast! The unique non-daily life experience of travel boosts the girls' excitement, and they increasingly challenge themselves with lewd activities!
