Oh!

So you came!

clunk

clunk

I've just come to pick up my book.

What's THAT?

Ah, this

is a line-pull.

It's useful in footraces.

Real convenient.

What.

Over here ♪

That's the classroom entrance,

and this is the backdoor.

If you're just picking up your book and leaving,

it's best to just sneak in through the back.