Mahou Sensei Negima!

Mahou Sensei Negima! (also known as Negima! Magister Negi Magi) is a manga and anime franchise created by Ken Akamatsu.

Chapter 33
The chapter cover shows the members of the Kyoto field trips group 3 Ayaka Yukihiro, Kazumi Asakura, Chizuru Naba, Natsumi Murakami and Chisame Hasegawa bathing together during their groups turn to use the Onsen at the hotel for the Kyoto field trip. The top of Zazy Rainyday's head can be seen above a rock also bathing with them even though she is not part of their group. Ayaka is seen in the middle having a hangover while Asakura is sitting next to her crossing her legs and offering her a drink that can possibly help with her hangover. Chizuru is seen trying to cheer up Natsumi who seems to be depressed over the fact that all the other girls in the bath have bigger breasts than her while Hasegawa is seen casually saoking at the end commenting to herself that their breasts are huge.

Chapter 66
Chizuru Naba strips and takes an Off Screen Bath with Kotaro Inugami.

Chapter 220
Konoka Konoe is seen taking a Shower in Haruna Saotome's new airship. 

Chapter 221
Negi Springfield has several Flashbacks about Asuna Kagurazaka. One of them was when she was bathing him at the Mahora Public Bath in chapter 3 and the later one was when he saw her Skinny Dipping at Library Island in chapter 9. 

Chapter 229
Setsuna Sakurazaki has a Shower of angst in Haruna Saotome's airship where she is frustrated with not being able to beat Tsukuyomi. 

Opening Credits
Asuna Kagurazaka is seen Skinny Dipping under a Waterfall Shower and washing her arm.

Chapter 1
Evangeline A.K. McDowell has an Off Screen Bathing scene where she casually leaves the bathroom completely naked in a montage of her living with the series protagonist Touta Konoe.

Chapter 3
There is a Skinny Dipping scene with Touta Konoe and Kuroumaru Tokisaka.

Chapter 5
There is an Onsen scene between Touta Konoe, Kuroumaru Tokisaka and Evangeline A.K. McDowell.

Chapter 6
The Onsen scene between Touta Konoe, Kuroumaru Tokisaka and Evangeline A.K. McDowell continues on from last chapter.

Chapter 10
Kuroumaru Tokisaka has a Skinny Dipping scene.

Chapter 12
Kuroumaru Tokisaka takes an Off Screen Bath.