That's amazing!

How's it work?

I put it on your smartphone, Yuubari.

I've developed a Sure-Fire Cockroach Killer application.

Well you see... You detect and confirm the position of the cockroach...

Ohh... detection...

Near to you

With the smartphone.

With the... smartphone?

...what? Hang on, that's my smartphone!

Using your eyes, you find where they are, then smash 'em!

Ooooh!

Die~