The hyper,happy and bubbly child is nowhere to be seen,his face is now always stoic,face expressionless but his eyes holding a lot of suppressed emotions

Or

Vixx were childhood friends but the sweet and bubbly taekwoon had to move away,leaving the other five always missing him and his sweet gentle smiles until he suddenly moves back into the town.

But he's no longer the taekwoon that they knows back then.