because she is Eunhyuk's step sister and now she is an adopted sister of Suae.....in both cases the blondie is an illegitimate kid therefore she is jealous of both of them. And since the two of them had always sympathized with blondie, she thinks that she owns them and everything related to them.
shuli is so pretty. I love the way the author blends her into the background and like uses an orange blend mode to make her more welcoming ╥﹏╥ she’s so beautiful in both ways
crying
they are so cute
PLZ WISHING FOR THE BEST