Try these?
https://www.mangago.me/read-manga/weekend_citron/
https://www.mangago.me/read-manga/kimi_no_tonari_de_yurarete/
https://www.mangago.me/read-manga/gomi_yashiki_no_kamakura_san/
https://www.mangago.me/read-manga/kuyuru/
https://www.mangago.me/read-manga/hatsukoi_note/
https://www.mangago.me/read-manga/kiss_de_egaku_ittousei/
Omegaverse (A x O)
https://www.mangago.me/read-manga/kono_te_wo_hanasanai_de/
This one is a bit angsty, so not really fluff, but the other stuff is there.
https://www.mangago.me/read-manga/rockabye_dear/
This one has crossdressing, in case you mind, but is v healthy.
https://www.mangago.me/read-manga/ashita_niji_ga_denakute_mo/
o my bad, you said no omega verse. I can't read, ignore that one.
Fuck it, I'll take em!
Wholesome yoai pls, preferably no omegaverse stuff, oh! Oh! And if the MC can be a depressed sads boi before meeting the ML that would be wonderful!