Why Do You Keep Pretending to Be Bad?

what happens

During the trip, Si Hyun takes Soo Ji's side and acts coldly toward Tae Hee. Tae Hee is surprised to see him act this way since he has always been warm toward her when they were together. Si Hyun apologizes, and the two reconcile. However, Soo Ji finds her and tells her a lie. She lies that Si Hyun and herself are actually in love with each other and that Si Hyun's only acting this way toward Tae Hee in order to hide it.