Read manga: Dousei Chuu!!

manga
Other name: 同棲ちゅう!!
Artists: Benny's
Status: ongoing
Latest chapter: Chapter 4
Updated at: Aug 25, 2019
Summary:

Shinya goes to live and take care of with his two younger cousins, Tsubasa Fujisaki and his younger brother Subaru, after their parents go overseas. However, Shinya is surprised to find both cross-dressing upon his arrival.