1x25 - Young Lady and Gentleman

Young Guk's kids receive a great shock when they find out about Young Guk and Sa Ra's engagement. Se Chan even leaves a note saying he refuses to accept Sa Ra as his new mom and disappears. Meanwhile, Sa Ra asks Dan Dan to help persuade the kids about her engagement to Young Guk. Although it hurts her to say it, Dan Dan talks to Jae Ni and Se Chan to support their dad.