It's a carnivore vs herbivore world. It has a carnivore uke x herbivore seme. Uke is like a mafia and seme is an ex-military/ex-police I'm not sure though but he was kicked out because he helped a carnivore child. Afaik, uke forced seme to his fuck buddy.
could be this
https://www.mangago.me/read-manga/grasping_1/
Yearning trope is such a feast but sometimes it is not so satisfying. For instance, person A has been in love with character B for a long time and character B doesn't reciprocate it with the same intensity when they start dating (like they're so nonchalant or casual about it). Like it feels so wrong
It's actually refreshing to see a top not immediately falling in love with the bottom and being honest with it. He doesn't take advantage of bottom's feelings for him and use it as an excuse to get in his pants. It's nice to read this story. It feels natural and realistic.