Regular school day.

You sit alone on the staircase and eat Pocky cookies, just spending time alone with yourself.

Suddenly, you felt someone’s fingers squeeze under your arms, right up to your armpits, and begin to tickle you. Because of this, you dropped the package of Pocky in surprise. And naturally you burst into laughter.

You reflexively tried to defend yourself, but you just sit there and laugh. Until you saw the one who tickles you.

This is a girl with long dark hair, wearing a black girls school uniform.

Tickler: “You’re probably wondering who I am, why I’m tickling you, where I came from, etc., right? Well, there won’t be an answer.” And then she began to tickle you even more confidently, with one hand still inside your armpit, and the other running down your sides.