Rin: Why is the ocean blue?
Miku: Because it's the ocean.
Rin: That doesn't answer the question...

Len: I had a bad dream.
Miku: What dream?
Len: I forgot.

It runs very smoothly in Flashpoint.

There's a few items to collect and you can find Rin and GUMI (and I think Len?) and chat with them a bit.

The game was also archived in Flashpoint.

EDIT: It's AVANNA, not Miku.

Now I somewhat remember hearing it and thinking it sounded like Miku but not quite, which prompted my curiosity.

After carefully checking the video, I realized that this was at my college, in the cafeteria area. Oh, cool!

Hearing Miku's voice was probably what prompted my curiosity to record and identify it.

It's Porter Robinson's Sad Machine feat. Hatsune Miku.

But now that raises more questions because I totally forgot where I recorded this. Where were they playing a Miku song over a PA??