I don’t get it...? If you have feelings for him and he just confessed to you why would you lie,?
Because Han isn't stupid. He knows Yeon doesn't love him, he just want to make him happy no matter what. But Han really loves him and he doesn't want Yeon to sacrifice his own happiness.
I don’t get it...? If you have feelings for him and he just confessed to you why would you lie,?