Does anyone know if these two couples are from a manga and if so which one ? They look lik...

From the same author:
http://www.mangago.zone/read-manga/pinup_boy/

^UNFINISHED （/TДT)/

http://www.mangago.zone/read-manga/otoshiana_ni_hamerarete/

You should read all the stories from this author, since the couples are often mentioned in other stories as well.

Ohh I read pinup boy, I didn't read the the other story, but I read most of the stories from that author just didn't pay much attention so I didn't realize it was all from the same author, I'll read the rest stories, and thank you