The Melancholy of Haruhi Suzumiya

The Melancholy of Haruhi Suzumiya is a series of light novels that became an anime series by Kyoto Animation.

The Melancholy of Haruhi Suzumiya (anime)
The anime has had multiple episode orders and was changed when the 2009 airing added 14 more episodes in. This series will be acknowledged on this site in the order of the 2009 airing.

Episode 11
After being rescued in the rain with Haruhi Suzumiya, Kyon takes a Shower Off Screen at the mansion the SOS Brigade was staying at.

Episode 23
Mikuru Asahina takes an Off Screen Bath at Tsuruya's house to warm up after being thrown into a lake from shooting a film. When she comes out, she is wearing only a white gown which is then used for more scenes of the film they were recording.

Episode 25
The completed film that the SOS Brigade shows a scene of Itsuki Koizumi carrying Mikuru Asahina into a room room while she is wearing a white gown with Kyon's commentary saying that the scene can be interpreted that Koizumi gave her a Bath while she was unconscious after being thrown into the lake.

Later on in the film, during a montage of Mikuru being Koizumi's wife, she accidentally opens the bathroom door while he is Showering.

Dissociation of Haruhi Suzumiya
Kyon takes a Bath and gets a phone call.

The Disappearance of Haruhi Suzumiya (anime film)
In the alternate world that Kyon gets stuck into during the movie, He hears a conversation while having dinner at Yuki Nagato's house where Ryoko Asakura asks Nagato (who is a normal shy human girl in this universe) that they should check out some Bath Stools because she noticed that Nagato's bath stool has a crack in it.

This reveals that this alternate universe human version of Nagato has Furo sessions and uses a Bath Stool. It also implies that Ryoko Asakura may have possibly bathed Off Screen at Nagato's house on a more recent occasion for her to notice that crack in the bath stool.