Son of picture book author

This is a story where the uke is at an academy I think and runs away to a chapel to get away from everyone. Inside he meets the seme whose like really popular in the school. The seme loves the moon (I think) bc he read a picture book as a child and the author of that picture book is the father of the uke. He falls in love with the uke bc he remembers hearing a lot of things about him from ukes father (the author). Can anyone help me find this???