so you think only woo yeon treated him bad ,how about wo jin?they both not nice to each other ,in real life there are brothers that don't even talk to each other. i don't think it's woo yeon fault, they are step sibling after all ,it's normal to hate step sibling
If only Woo Yeon treated him better. I can't hate Woo Jin for resorting to hypnosis though.