Help plot twist got me spinning and yet it's a long way to go

AHH I HAVENT READ THIS IN LIKE A YEAR WHATS THE PLOT TWIST

I think the part where her ex came back or that jiwoo lied about being a virgin, smth like that maybe (?)

Ohh wait i read like 2 of the new chs. I thought jiwoo actually was a virgin but just decided to say he wasn't?? Why does bro look so nervous

Maybe hes lying? I lowkey hope hes not lying because I wanna know with which type of women he made out and if they/she gonna show up since this mhanwa haves only 3 characters