sakuya always wears a pink hairtie on his wrist! his little sister gave it to him. since he's far away and would miss a lot of her milestones, it's his way of reminding her that he always thinks of her no matter what.
this is one of my favorite fact :(( ๐ฉท
anyways this is probably a non issue but whenever kpop groups play into the boyfriend/husband role too much i get icked out and just pretend it doesnโt exist to keep liking the group