Thanks SkyDragon3564!
CassiopeiaSD is right! OOC is short for Out Of Character~
And yup, the antagonist route can feel weird if I don't develope it in the right way --but man, they said Love and Hate are two different sides of the same coin but it's dang hard to make two people who initially hates each other to like/love each other x'D
The antagonist also doesn't want to cooperate with my ideas sometimes so... yup, struggling OTL
But it's getting better! Slowly but surely! The important scenes turned out better than I had planned so your wait will be worth it! >:D