[Eren's cheeks have gone pink, his heart racing. He rushes through the emotion, taking the larger wristband out of the box before Jean can. He tugs on the older boy's hand.]

Listen...[His voice is quiet, somewhat anxious.

[He takes Jean's hand with both of his, turning it palm-up. For a moment, he just...holds it, running his thumb gently over the other boy's palm - admiring, appreciating, savoring. He gives it a gentle squeeze. And then he takes the wristband and ties it carefully around Jean's wrist.]

I tie yours...you tie mine...

And we don't take them off. Not until they break on their own...

[He isn't looking at him. His eyes are on Jean's hands.] Or it's bad luck...

[Not that Eren really believes in things like "good" or "bad" luck, but...

[It's a promise, unspoken. Only destiny will break them apart. They won't choose to do it on their own.]