Kim Ji Won finds out Sulli's true identity.
In the 10th episode of the SBS drama 'To the Beautiful You' that aired on the 13th of September, Han Na (played by Kim Ji Won) looked through a yearbook and found Jae Hee's (played by Sulli) past photo.
In this episode, after finding out that Sulli is a girl, Han Na sneaks into Jae Hee's dorm room and spills the evidence that proves Jae Hee is a girl.
Jae Hee begs Han Na not to say anything, but she heads towards the office anyways. However, after hearing from the school doctor that this might hurt Tae Joon's (played by Min Ho) reputation, she decides to keep it a secret for now.
However, Han Na runs into Tae Joon on the way out. She finds out that Tae Joon knew about Jae Hee's identity all along and starts to cry.
On the other hand, in this episode, Tae Joon also decides not to go to Canada to train with Coach Holten in order to stay by Jae Hee.
