We follow Toga Himiko on her quest to become a normal teenage girl, stalking the class of 1-A and finding things out about them while disguised as none other then the 1-B student Pony Tsunotori. While she does this, however, she breaks the one rule she had made for herself.
Don't get too close to anyone.
That was her only rule, her only limitation. Yet of course, of course she had to break it to get close to a certain student with a round face and big beautiful brown eyes.