Merman in My Tub

Orenchi no Furo Jijō, The Circumstances in My Home's Bathtub is a Japanese four-panel comedy manga series by Itokichi, serialized in Media Factory's Monthly Comic Gene since 2011. It has been collected in five tankōbon volumes as of September 2014. An anime television series adaptation began airing in Japan on October 6, 2014.

Plot
The four-panel manga begins with Tatsumi, a high-school boy who lives by himself. Then, a devastatingly handsome merman named Wakasa moves into the bathtub in Tatsumi's home. Wakasa is a bit self-centered but cute, while Tatsumi is cool but a busybody. The manga offers a peek into their lives together.