could be wrong, I think when the news came out huis dad's a criminal since he was dating Aaron he didn't want to bring down his reputation... I think that's what it was
yujin was gonna stay with aaron after going back and forth with himself on whether or not he should stay bc of his dad. just as he was about to tell his friend to cancel his plane ticket in order to escape, he saw news of his dad become public. he didn’t want his relationship with aaron to tarnish aaron’s life/career (bc his dad was a pos) so he bounced. the guilt he felt was too much… like he didn’t feel like he deserved anything aaron had done for him.
Can someone give me a refresh on why he left or is missing?