Responses
http://www.mangago.me/read-manga/concrete_garden/
Probably this one...?
Sorry for the late replyyyyy.... this is the one thank you so muchhh~
An angel(?) Was caught by the government(?) and it was violent. Then give him a companion. And so they gave him one. I dunno the rest cause I forgot but. The last thing I remember is that the guy (companion) was the angel's mate and in the end they had children.