is a Japanese manga series written and illustrated by Hiroto Ida.

It began serialization online via Shinchosha's Kurage Bunch website in October 2013 and has since been collected into eight tankōbon volumes.

[1] An anime television series adaptation by Asahi Production aired from April to June 2018.

An anime television series adaptation by Asahi Production and CJT aired in 2018.

[2] The ending theme is "So Happy", performed by Aya Uchida.