At Eighteen

I'm Sorry (1x9)

Air date: Aug 19, 2019

As Jun Woo blames himself for Soo Bin’s sudden attitude change towards him, Soo Bin is confused about whether to believe Hwi Young's message or not. Hwi Young watches Soo Bin suffering but can't bring himself to tell her the truth. Meanwhile, as the new class vice-president, Jun Woo plans a special event for the school trip with the other kids in class.