 If you liked
Koishite Daddy
|
 ...then you might like
Kimi to Asa Gohan!
|
If you are looking for a yaoi with family concept, they share that theme (two men in love and one kid). Apart of that, the extra of Kimi to Asa Gohan is similar to the sequel of Koishite Daddy, showing their life time later when the kid grew up and their interactions are similar, but of course the extra is very short.