help!!

i read this manhwa twice already, it has a shounenai and a yaoi version, it is about two childhood friends, i think the top is black hair and i forgot about the bottom, but they were friends until middleschool i think, and while they were in middle school, the bottoms grandma told them that the bottom is supposed to marry someone, and the one he’s supposed to marry is his bsf, which is the top, and after that i think the bottom got uncomfy with it, so he moved to seoul to become an teacher, and a few years later, he met his childhood bsd again, but he got a job in the same school as him as a PE teacher, after that the top stayed over at the bottoms place telling him he'll stay there until he finds a stable apartment, and a few chaps later, they dated, and they went to visit the bottom's dead moms place, and i think the inside of the vase was pearls??