is a Japanese manga series by Kana Mafune, who works for BS TV Tokyo.

It was serialized in 2017 and collected in a single tankōbon volume by Asahi Shimbun Publishing in October of the same year.

Deep") was serialized online via Asahi Shimbun Publishing's Sonorama Plus website between January 2019 and 2020 and also collected in a single tankōbon volume in March 2020.

An anime television series adaptation by Jinnan Studio and Space Neko Company aired from January to March 2022.

Izuki Minato performed the series' ending theme song "Work out!".