Seirei Gensouki: Spirit Chronicles

Seirei Gensouki: Spirit Chronicles is a light novel series that received an anime adaptation in 2021.

The story is set in another world, and follows a young orphan named Rio who one day awakens memories of his past life as a Japanese young man named Haruto Amakawa. As their memories and personas fuse, Rio finds that he also now possesses magical powers, which he uses to help in his quest for revenge against his mother's killers.

Episode 1
Rio eats after washing himself, after which he puts his shirt back on.

Episode 7
Rio takes a bath, and he is also seen training shirtless. Haruto and Rio also appear shirtless together.

Episode 10
Rio takes a bath.