Ok, Ruby-chan. So you wear this and scare Dia-san.

I'm the one doing it?!

Pigi!!

After that

It's Halloween, so let's dress costumes and scare someone!

Sounds fun!

Knock knock

In the end, I was forced to do it. Not sure if やるハメ　means that

Big sis...

What, Ruby?

If you don't give me sweets, I'll play a trick on you!

Ruby!?

No way! Ruby in that outfit...

You pervert! -You

Forget about the candy! Play a trick on me!