Responses
https://www.mangago.me/read-manga/life_senjou_no_bokura/ old age
https://www.mangago.me/read-manga/rengoku_no_millennium_a_millennium_in_love_s_purgatory/ old age, uke (demon) took him to hell & story continues there. Noncon.
https://www.mangago.me/read-manga/one_room_angel/ hinted that he died at the end & meet uke (angel). It's Harada so prolly noncon, I forgot.
I need a story where the top dies.