Responses
I’m not sure if this is it cuz Uke isn’t masculine or older I think but he did have heart surgery and the memory of the previous donor
https://www.mangago.me/read-manga/pit_a_pat/
No it's not it.. but thank you for the similar recommendation .. (I can't share photos so it's tough.. but thank you)
I'm trying to find this BL.. where the uke is black haired mature and masculine and maybe older than seme.. I don't know if this description will be suffice but the only thing I know is that the uke (may) had a heart surgery because he's a surgical scar vertically in his chest and it's long... (= • ㅎ • =)