Promise will need to be taught to use the clock.

That's fine, so long as she can read the digits – he's told they use 24 hours in a day and 60 minutes in an hour and 60 seconds in a minute, so that's neat, and the clock displays the number of each.

Cool. Promise likes this clock.

That's good!

He sits down to continue practicing the water purification thing.

And Promise draws and writes and munches assorted fairy food.

He has a break for food, like yesterday!

"How long are you planning to practice today?"

"Most of it, like yesterday?"

"You feel okay being unsupervised for a few hours? I should get some foraging in today."

"Yeah, I should be fine," he says. "And the gate's right there anyway, unless you plan on closing it?"

"I can leave it open, it's just a problem if someone wanders through either way - how accessible is it on your end?"

"Uh, kinda? It's in an alleyway, so someone could stumble across it. … It wouldn't be much help to me if I did need it anyway, I don't think, so nevermind."

"Closed it is. I'll be back at like..." She consults her clock. "Threeish."

He nods. "See you then."

And off she flies.

And he continues practicing!

Until he notices that he has lost a large part of his day, is in Fairyland alone, and has no idea what's happened since he ate breakfast that morning.

"Promise?" he calls.

Nope.

He gets up, grabbing his bottle of water and noting what the area looks like, and has a look if Promise is anywhere nearby.

Nope. Area is void of Promise.

Purple will return to the little grove, in that case. Promise presumably knows where he is, since he presumably acted normally for– however long. He hopes. Since he's done that so far.

He checks the gate.

Closed. Like it's not even there.

Ugh. Of course it is.

He sits back down and puts his head in his hands for a few moments, then decides that he should probably just– continue with the water, that's a way he can pass his time. He'll probably be fine.

He continues to be totally alone in Fairyland with no way home.

He tries to keep his mind off this fact – he had no way actually home anyway, and he's not strongly attached to the mortal world, he just– would really rather not have to stay in Fairyland for very long, especially not without a way back to the safer no-magical-orders place.

Water purification. He can practice that. That's safe.