Back Street Girls.

Back Street Girls (Japanese: バックストリートガールズ, Hepburn: Bakku Sutorīto Gāruzu) is a Japanese manga series by Jasmine Gyuh. It is about three yakuza men forced by their boss to become a female idol group. It was serialized in Kodansha's seinen manga magazine Weekly Young Magazine from March 2015 to September 2018 and was compiled into 12 volumes.