Can anyone recommend a manhua/hwa where a girl/boy only realize that they love the person after they rejected them? (It can be yaoi or straight
I can't think of any with the same trope but you can try this manga it is really good
https://www.mangago.zone/read-manga/sonna_ni_iu_nara_daiteyaru/

Can someone tell me the title of a yuri manga where a transferee girl saw her two girl classmates kissing and somehow got tangled up in their "routine"
Is it this?
https://www.mangago.zone/read-manga/girls_in_bloom/
Yes it is! Thank you so much!