I don't remembr the title either, but I'm sure that it was by someone called 'Bboong' who also made a few other stories. I'm sure if you look for them, you'd find the manhwa because that's how I found it.
is it "Crush On You"? i remember reading it a while back and the plot sounds like this but im not sure
http://www.mangago.me/read-manga/sweet_trap/
Probably this one?
yes! it’s that! thank you so much!!
yes! it’s that! thank you so much!!
thank you!!
yw :)
im looking for a bl webtoon! it’s abt a guy who can’t tell women apart then he met a “girl” which face looked different and pretty. then later on he finds out that the “girl” is actually a boy and then his sister comes in revealing that she also has a crush on that boy. then in the final chapter the girly boy becomes the seme. pls help i’ve been trying to find this for so long :’’((