The World God Only Knows

Chapter 45
Tsukiyo Kujou who was shrunken, takes a Milk Bath in a Clawfoot Bathtub that is inside of a doll house. After getting out, she Towels off and then when she is getting dressed she realizes that the bathtub is suddenly a lot bigger to her now because she is shrinking even more.

Chapter 83
Keima Katsuragi who was body switched into Yui Goidou's body, strips and then takes a Bath in a Hot Spring.

Episode 2
Keima Katsuragi takes a bath at 9:30 while playing his portable gaming system. The lights go out and Elucia de Rux Ima gets into the tub with him. When he opens the blinds to see that she is naked in the tub with him, he quickly gets out and hides in the corner covering himself with the bathtubs cover.

Episode 5
Elucia de Rux Ima has an Off Screen Bath after Mari Katsuragi tells her to after she saw Elise pretending to be an idol.

Episode 8
Mari Katsuragi has a Furo session to wash off the grease after working on her bike to meet Keima Katsuragi's teacher later.

Episode 7
Elucia de Rux Ima announces that she had an Off Screen Bath as she walks out of the bathroom with a Towel on her head.

Episode 12
A personification of Keima Katsuragi in the form of a male version of Sayla Mass is shown finishing an Off Screen Bath in Dream Sequence parodying the last episode of the original Mobile Suit Gundam series. The bath scene was a parody of Sayla's bath scene in the last compilation movie of the series known as Mobile Suit Gundam III: Encounters in Space.

Magical Star Kanon 100%
Kanon Nakagawa takes a Shower and sings but then gets turned into a child by a runaway spirit.

Episode 1
Since Yui Goidou's arc was skipped, a flashback introduces her into the anime which shows the time Keima Katsuragi was body switched with her and was Stripping to get ready to take a Bath in a Hot Spring though the actual bathing scene itself ends up being Off Screen.

Episode 2
Haqua du Lot Herminium is seen taking a Shower in the Katsuragi Residence Bathroom for a Furo session. As she is about to get into the Bathtub, Keima Katsuragi comes in to bathe and while not noticing her for a second she screams and attacks him.

Episode 9
Keima Katsuragi takes a Bath seeming miserable and is suddenly joined by Tenri Ayukawa who strips down into a Swimsuit and joins him.

Episode 11
Ayumi Takahara takes a Bath.