Mark was tired. Physically, emotionally, and mentally he wanted nothing more than to just go back to the dorm and sleep for a week but he can't. No matter what he has something to do. If he's not practicing for NCT 127, he's practicing for NCT U, or NCT Dream. If he's not practicing, than he's at a music show. If he's not at a music show he has some other show that he has to work on. School Rapper or being a fill in MC.

Mark was tired and everyone could tell. 

All the members try their best to help Mark