@jiyui
Probably she wasn't acting like herself while she were together with him, that's why it was tiresome for her.
And then Haejun said in this chapter,
At first, when I didn't know the person in this house is you, I thought you weren't normal. And he said, I just love you the way you are. in the end.
I think that's the situation
Thank you for the update! (^3^♪