Thanks in advance!

https://www.mangago.zone/read-manga/kill_my_love/
(top is a red flag)

https://www.mangago.zone/read-manga/the_dawn_that_cuts_through_the_night/

https://www.mangago.zone/read-manga/nekama_punch/
(i think he’s younger i can’t really remember)

https://www.mangago.zone/read-manga/kiraide_isasete/

https://www.mangago.zone/read-manga/eat_me_up_my_husband/

https://www.mangago.zone/read-manga/a_tree_without_roots/
(top is a red flag, toxic)

https://www.mangago.zone/read-manga/the_last_step_on_the_way/
(really cute and heart warming!)

A tree without roots is getting pretty popular if you haven't already read it. It deffinetly going to take a killing stalking esc turn (not a spoiler it's in the first chapter) so watch out for that.

Lover boy was dubious since these are all age gaps but I actually really liked this story gave my feels a run for their money.

https://www.mangago.zone/read-manga/enthusiasm/

https://www.mangago.zone/read-manga/love_shuttle/

https://www.mangago.zone/read-manga/unromantic/

https://www.mangago.zone/read-manga/true_end_of_those_days/

https://www.mangago.zone/read-manga/open_board_dreamyzz/

https://www.mangago.zone/read-manga/pussy_king_sama_no_akuheki/ (i think so?)