This is Reimu, after all.

Her will to resolve the incident drew it to her.

She never noticed until now,

but the key has been echoing as it should the whole time.

Maybe it's because she was always just looking up.

Hmmm.

So, oh sage,

I take it you've been peeking at her looking for the key every year.

I was thinking I never see you around this time.

It's my hobby.

That's a terrible hobby.

...I wonder if they'll catch it in the end.

Maybe

she'll keep sleepwalking forever starting this year.

Oh?

Why do you think so?

Because, that lock that's running away now.

That's Reimu's, isn't it?