Innocent female students come to a rural inn on a school trip. The girls are at an impressionable age and are very innocent. They try their best to learn things that they would never learn at school! They are curious about a man who happens to be there in the open-air bath. They are also excited to see a penis for the first time, and they wiggle their cute little bodies, touching and licking it while asking, "I wonder if this will fit in here?" The extraordinary feeling that comes with traveling raises the girls' spirits, and they try more and more naughty things!