No BraNo Bra.

No Bra (Japanese: のーぶら, Hepburn: Nō Bura) is a Japanese teenage boy's romance manga written and illustrated by Kenjiro Kawatsu that was serialized in Weekly Shōnen Champion from 2002 to 2004. No Bra tells the story of Masato Kataoka, a somewhat dimwitted high school student, whose childhood friend Yuki Nomura moves in with him one day. Because of Yuki's cute face, girlish clothing, and apparent feminine features, Masato is extremely happy with his new life-until Yuki's mother calls Masato, and tells him that Yuki is a boy shortly after.