Tsuruko Returns the Favor
Tsuruko no Ongaeshi
Nekokado is an extremely straight-laced high school teacher who has lived alone since the death of his sister. But one day, he discovers a photo of her in a maid costume. He goes to a concept café in order to investigate his sister's secret, but there he meets a girl named Tsuruko…?!
(Source: Manga Plus)
