Honestly I find it really odd that she has any sort of feelings for Woo Joon, he literally doesn't have a personality. I get that she liked Hyun Soo but that ain't him! AND speaking of Hyun Soo I feel like Hayeon should be more worried about what happened to him. Like seriously he is virtually dead currently. I think its unfair to let Woo Joon keep doin' whatever while Hyun Soo is floating around in a void somewhere I guess? I know Hyun Soo wasn't the greatest guy but what if this happened to you, creepy as hell I think.