Its seem match Fujisaki Kou works.
Couple appear in
http://www.mangago.zone/read-manga/aikata/
http://www.mangago.zone/read-manga/ueta_aikata/
http://www.mangago.zone/read-manga/aikata_no_aishikata/
I might be wrong but that describe remind me of this couples.
Nop
The uke has a really long hair in a pony tail and the seme has a blackhair with glasses
Rapes the uke in the desk
Before daylight love.
Nop is about a boss and a mailman/delivery guy
They make out in desk office
Mailman is blond long haired (ponytail hairstyle)
Seme black haired megane man (chairman/boss)
The art is different idk but i cant find the manga a person find somethin similar but it was not the same
the uke is blond , long haired, uses a cap, hair in a ponytail (like a mailman or delivery guy)
seme is black haired, have glasses, slick back hair (company boss, shark loan maybe yakuza)