Not that much of an age gap but I really enjoyed this one https://www.mangago.zone/read-manga/midnight_rain_ctk/
Thank you gang gang
this ones 27 and 42 if ur okay w that https://www.mangago.zone/read-manga/dead_or_alive/
Finished it and yes i liked it
https://www.mangago.zone/read-manga/40_made_ni_shitai_10_no_koto/ 30 and 40
https://www.mangago.zone/read-manga/mitsuya_sensei_no_keikakuteki_na_edzuke/ 29 and 54
https://www.mangago.zone/read-manga/first_of_summers/ 24 and 40 (cute but age gap kinda weird for me so I just pretend 40 is 30)
you might have read these suggest but I'll send my favourites
https://www.mangago.zone/read-manga/yabun_ni_kyuuketsu_shitsureishimasu/ (more focus is on the vampire plot than the romance)
https://www.mangago.zone/read-manga/koi_ga_ochitara/ (the one that set the standard for age gap bl)
https://www.mangago.zone/read-manga/mobsters_in_love/ (too freaking cute I've read this one like 10 times atleast)
https://www.mangago.zone/read-manga/ore_ga_mitsuketa_konbini_no_koi/ (another classic)
Man I want an age gap where it's just 39 and 50 and not 18 and 40 for once. For some reason age gaps NEED to be like that. If the bottom is older, the seme NEEDS to be a specific archetype