How are we supposed to get any progress with the actual main couple if Jiho is sticking her tongue into the pink haired hussy every other chapter smh.
It's still waaay to early for that. From a story standpoint Yeon-woo is the catalyst for Woo-hui to get all lesbo with Ji-ho. Without her they would just remain friends forever. She needs to "date" Ji-ho to make Woo-hui super jealous, and get her to
want to stick her tongue into Ji-ho.
Also this all but proves she's just using Jiho yet Jiho is blind by how hot she is.
Yeon-woo was very clear about
only looking for sex, and not a relationship. And given her backstory it's understandable. If Ji-ho is looking for more (we know she does, but anyway), that's on her. And yes she's possessive, insecure, and sending mixed signals, but she is meant to be a Femme Fatal, at least for poor Ji-ho.