Responses
Hinadori wa Shiokaze ni Madoromu-This may be what you are looking for or close to what you mean.
THANK YOUUU(≧∀≦)
http://www.mangago.zone/read-manga/sekai_wa_shippo_de_dekiteiru/
you can try read this..
Thank you ε=ε=(ノ≧∇≦)ノ
Any shounen ai/yaoi manga about where the seme and uke take care of their little brother/sister/cousin/etc...I didn't mind if they adopted child together [as long as seme or uke not a single parent thing.... （￣へ￣）]