TSURUKO RETURNS THE FAVOR

Tsuruko Returns the Favor summary:

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)

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 the