Omamori Himari

Yuuto Amakawa lives a normal life until he's visited by a strange girl on his sixteenth birthday. Beautiful cat spirit samurai Himari tells him about his family's heritage as demon slayers.

After going swimsuit shopping, Yuuto, Himari, and Rinko join their classmates at the beach, but a demon is lurking under the sea to kill Yuuto.

Water demon Shizuku decides to live with Yuuto and the others, making Himari fell bad about her domestic skills. Himari gets a job at a local café as a cat-eared maid, but there's something off about the lead waitress.