In the end Halloween passed by with me not being able to prank Haruka-chan...

What sort of prank were you planning to do?

To tickle you on the sides.

For about 5 minutes,

The standard prank, isn't it.

Touching Haruka-chan is such a high hurdle that-

...I-

If it's you any prank is fine with me.

...this is not something your should say to anyone...

Let me say this as Haruka-chan's fan number one.

Kiritani Harukaaaa

You don't have to worry.

I won't say it to anyone but you.

That's even worse than the line before.