hi anon ^-^ icl, this is kinda tough, i'll try my best but please excuse me if there are some where they are equally as gone for each other
https://archiveofourown.org/works/45461146 villian yeonjun and fem hero soobin, does it count if yeonjun is oblivious that soobin is into him?
https://archiveofourown.org/works/56062777 soobin is kind of an asshole to yeonjun at first but he redeems himself dw
https://archiveofourown.org/works/57327886 this one might be a bit more on the feelings realisation side? but kai does fall for soobin before soobin properly falls for him so idk
https://archiveofourown.org/works/19285813 this beomjun fic is absolute gold, the hanahaki element works really well in this fic
https://archiveofourown.org/works/42447117 beomgyu falls first but taehyun falls harder with his fae husband
https://archiveofourown.org/works/41915724 i think this may count, considering taehyun does fall for beomgyu but beomgyu is in SEVERE denial until the end
https://archiveofourown.org/works/47557030 the whole office tries to get beomgyu and taehyun together, it's a a pretty fun read
i hope this is enough fic recs for you anon, i have to say it was lowkey hard to find fics that met the criteria, sometimes its hard to know if someone falls but the other falls harder when sometimes it's just one of them being oblivious? if you get what im saying? i hope these fics are ok though, i'm so sorry if they aren't but i hope you still find smth you like and have an amazing time reading :)