Yaoi manga

Okay I think I read manga on another website maybe renta...... from what I can remember, the uke is doing co-op in his old preschool. Then he learns that he is no the only one doing co-op, and the person is he preschool friend(which he thinks was a girl...nope). Fanlly he learns that his old friend is a guy. One other thing I remember is I think the English title has the word preschool.
Hope humans can help, and thank you.