Oh wait! I totally read your question wrong..sorry these are wrong.
Following, sorry
Not exactly what you’re looking for but the story is similar plus it’s really good. I enjoyed it (づ￣ ³￣)づ
http://www.mangago.zone/read-manga/because_of_you/?av=1
http://www.mangago.zone/read-manga/dear_gentle_papa/ haven’t read it but the description fits!
akkkajdhj i know which one you might be talking about but i don’t remember the name. :
Can someone tell me the name of yaoi manga where the uke's friend fell in love with an elementary school kid and the uke himself then to that kid's father?? So confusing, I'm sorry ╥﹏╥ ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄