That's it! A prank!

She'll be an easy target!

As you can see, Hiyo-san is a creature whose body moves before her brain.

Huuuh—?

This project will test how long Hiyo-san will believe us if we keep lying to her.

Hiyo-san, to tell you the truth, Aya-san is an alien.

Isn't this prank a bit too sloppy?

Won't people think this is staged?