BL age gap, the seme is younger and the uke is older, they were like a delinquent at first and now they're not. THE 2 ARE MARRIED AND I CANT FIND THE NAME IN MY LISTS WAHHHH
I think this is it
https://www.mangago.me/read-manga/shima_chanchi_no_tsugaijijou/
Oh baby here
"Eat Me Up, My Husband "
https://www.mangago.me/read-manga/eat_me_up_my_husband/#:~:text=Eat%20Me%20Up%2C%20My%20Husband
I had this saved in my list of forever rereads and I kinda forgot about it. I remember vaguely one of them dying so I had little hopes but when I saw he lived when he fell, I got hopeful again... Until he didn't. Still, one of my fave reads and really made me tear up even years later.