Oshima launched the Joshi Kōsei Girls-High manga in Futabasha’s Weekly Manga Action magazine in 2001 and ended its first run in Comic High! in 2007.
Oshima launched the second run of Joshi Kōsei Girls-High in March 2014 in Comic High!, and ended it in 2016.
Publisher Shonengahosha’s release calendar is listing the fourth volume of Towa Oshima and Shibukichi Chabashira’s Shitamachi Sentō Kazoku (Shitamachi Bath House Family) manga as the finale.
Oshima and Chabashira launched the ongoing manga in Shonengahosha’s Young King magazine in April 2017, and the third volume shipped on June 25.