A common Sitcom and Anime trope in which one
character accidentally sees another character of the opposite sex in the shower. Usually, Bob will turn on the water, then leave the room for a moment. Alice, oblivious to Bob's presence, steps into the water and closes the shower curtain. Bob then returns, finishes stripping down, and opens the curtain back up, so they each get a view of the other [...] [tvtropes.org]