Strawberry Panic!

Strawberry Panic is a yuri manga series. It later had an anime adaption and then a video game and then a few light novels.

Episode 13
Kaname Kenjo and Momomi Kiyashiki take a Bubble Bath

Episode 15
Kaname Kenjo and Momomi Kiyashiki take a normal bath.

Episode 20
Tsubomi Okuwaka takes a Bubble Bath.

Episode 24
Hikari Konohana takes a bath