Cute mew.

"I'll definitely come, then."

"Great."

She grins, then glances at her watch. "Shit, I need to get going soon." They can exchange addresses and numbers though? And Ami can come over after school tomorrow?

Sure, that sounds good.

Where is her cram school, by the way?

She gives that address, too. "It's Crystal Seminar."

"Thanks."

"See you at school tomorrow."

"See you."

And she's off.

Erika takes out the floppy disc after she goes. "Do you, uh, smell anything on this?"

Sniff. "It's strange, but... It's hard to tell. It's been handled by Mizuno-san too much."

"Do you think we should try to run it?"

"I think so. I'll keep an eye on you to make sure it doesn't brainwash you."

Then back inside, and hopefully she can just get the computer Mizuno-san was on.

It's still open.

Great. What dark magics does the disc hold?

It seems... Normal? Just a bunch of math and chemistry practice problems. (But she has a strange feeling in the back of her mind...)

She will try a couple problems while making sure to pay attention to that strange feeling.

A whisper, nothing more, almost an intrusive thought:

The Crystal...

Give your energy to our ruler...

Find the Legendary Silver Crystal... 

Ungh.

Okay, she is going to stop for now.

"What's wrong, Erika-chan?" Luna whispers.

"Some kind of brainwashing, I think," she whispers back. "Telling me to find a Legendary Silver Crystal."

"That confirms it... This disc was created by our enemy. We can't let them find the Legendary Silver Crystal first."

"Might be easier to find them than the Princess. We know they're connected to the cram school now."