PFES-008 Only Male Student on a School Trip Ends Up in a Girls' Shared Room

The narrator is the sole boy after his school went co-ed, so on the trip he expects to keep to himself, but a group of girls invites him to their room. What starts as teasing turns into close contact under the futon, and then more girls join in. He ends up the focus of attention, with creampie encounters one after another.