Kang Seulgi and Bae Joohyun is married, because Joohyun got pregnant early when they were in high school and had a twin daughter named Yerim and Ahreum. But when things aren't working out for the couple they decided to get divorced out of their anger. One day Seulgi dissappeared out of nowhere. What will happen to them? 

Its about seulgi and irene performing "be natural" and winning 1st place. Their squad is planning to throw a party after for them, but seulgi didnt attend saying she have an emergency. I think she went home crying because of irene's suitor. im not really sure huhu please help meee