Witch Craft Works

Witch Craft Works is a manga series that received an anime adaptation which aired in 2014.

The story follows Honoka Takamiya, a seemingly ordinary high school student who has to deal with the constant presence of Ayaka Kagari, the "Princess" of Tougetsu High School. However, one day Honoka is attacked out of the blue but Ayaka saves his life, revealing herself to be a witch on a covert mission to protect him.

Episode 8
Kasumi walks in on Ayaka examining Honoka.

Episode 11
Honoka's clothes are taken off while he's resting.

OVA
Honoka takes a bath.