I predicated this!

This is not a prediction but I hope the story will be that Seunghyun already knows. He knew Yuta wants revenge. When he gets that call 6 hours after Yuta disappears I hope the story goes that SH realizes its a trap coz given all the security around Yuta couldn't have been kidnapped and had to have left on his own. The time delay before he gets the call and making sure SH knows Yuta needs to eat medicine within the next 2 hours is to make sure SH is panicking and doesn't have time to think. I'd want the story to be that SH already know that even if he didn't want to believe and took precautions.