Responses
Not yaoi though... But they have the names you were searching for: http://www.mangago.zone/read-manga/flat_aogiri_natsu/
Thanks so much! I assumed it was a yaoi cause I read a lot of single-dad things.
I don't remember the title but I know it was a yaoi about a single-dad. The kid's name was Aki and the boyfriend's Heisuke.