Some things can only exist if two people reach toward each other at the same time.

Create an account then enter your name and theirs. You write a short note, something you'd want them to find in the future. Then you wait.

If they do the same, a capsule forms between you. A private space, locked until a date in the future. You can both leave things inside. Photos, letters, small artifacts. The things you'd say if you knew they were listening.

On the unlock date, you both see everything at once.

And if they never named you back? Nothing.

In some ways, you'll never know what else was meant to be said, which means there wasn't anything to say, for now.

The door simply stays closed. Quietly. Without telling anyone it was ever there.