Yay... this trope ...

Hiyori Hiwamura is known as the "Scary Teacher," and if you offend her, she'll put a curse on you! Or at least that's what everyone believes. She's secretly a total softy who's deeply misunderstood, ...

Holy cow ...

Hiyori is bound and determined to help her students win the sports day jump rope contest. Unfortunately for her, keeping up proves harder than expected.