@jak
He promised her no commitments if she goes with him on a date. But he fell in love so much for her that he could not stop himself anymore. So he thought that she is not serious about them and he would just end up heartbroken that he might start to stalk her. Well he didnt know she felt strong for him. He would not break up otherwise.
@yamibi
I agree with you..i also thought in the recent chapter..So, now i think they agree to date with commitment in mind. And i hope Suk-whi will get pregnant soon..and the story of the youngest is starting..