Merman in My Tub

Merman in My Tub (オレん家のフロ事情, Orenchi no Furo Jijō, lit. "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 8 tankōbon volumes as of February 2020. An anime television shorts (4 min) series adaptation premiered in Japan on October 6, 2014 and ran for 13 episodes to December 29, 2014. The manga has been licensed by Seven Seas for English release.

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.