Hikaru-chan is a lively girl who came to a brass band training camp. She happens to encounter a group of men who are also on vacation, and after a quick conversation she decides to hang out in the men's room later... She's a friendly, natural girl who is staying alone at the inn after her friend overslept and left her behind. The warm and cozy atmosphere is very cute and she has a fun time in the room, but gradually the man becomes captivated and goes into sexual harassment mode... It seems she doesn't mind. This is the beginning of a naughty memory.