What is the name of the bathroom anime?

The anime you're referring to is likely "Onsen Yousei Hakone-chan" (Hot Springs Fairy Hakone-chan), which is an anime that revolves around the concept of hot springs. However, this might not be exactly what you're looking for if you meant an anime with a more specific focus on bathrooms or bathhouses in general.

Here are some other anime that involve baths or bathhouse settings:

1. "Yu Yu Hakusho"

• While not directly about bathrooms, "Yu Yu Hakusho" has notable scenes set in the Spirit Detective's office, which includes references to bathhouses and hot springs in certain episodes. Some scenes also take place in bathhouse-type settings.

2. "I Can't Understand What My Husband Is Saying" (Danna ga Nani wo Itteiru ka Wakaranai Ken)

• This short anime features a quirky relationship between a woman and her otaku husband. In one of the episodes, there is a scene set in a bathhouse.

3. "Kono Yuusha ga Ore Tueee Kuse ni Shinchou Sugiru"

• This series features humor and parodies common anime tropes, including bathing or hot spring scenes.

4. "Thermae Romae"

• This anime centers on an ancient Roman architect who discovers modern Japanese bathhouses. While it's not exactly a "bathroom" anime, the plot revolves around baths and hot springs. It’s a mix of history and humor, with a lot of focus on bathing culture.

5. "My Senpai is Annoying" (Senpai ga Uzai Kouhai no Hanashi)

• Although this series doesn't focus on bathrooms or baths per se, there are certain episodes where bathhouse or bathroom scenes are featured in comedic moments.

If you were looking for a specific anime involving a bathroom theme or bathing culture (whether comedic or historical), these might be examples that come close to what you're thinking of. If you have a more specific description, I can help narrow down the options further!