Hierarchy: Season 1

Kang Ha enters Jooshin High and quickly ruffles some feathers. He soon attends a rowdy party — and partakes in a provocative game of truth or dare.

After Kang Ha's daring stunt at the party, he faces the vengeful Kim Ri-an at school. Later, at a retreat, Kang Ha and Jung Jae-i begin to get closer.

As Jae-i and Kang Ha present as a couple, a jealous Ri-an resorts to his own tactics. At the lavish Parent's Night, Yoon He-ra pulls a hostile stunt.

He-ra plants a suspicion about Jae-i in Kang Ha's head. As anonymous threats continue to plague Jae-i, she disappears from school.

After Kang Ha's confession, Jae-i is overwhelmed by the truth and decides to leave. At her farewell party, Ri-an makes an entrance — and a declaration.

Kang Ha plans a strike to make the school an even playing field. But Jae-i attempts to protect Ri-an from the blow, revealing a hidden secret to Kang Ha.

Kang Ha's crusade against the bullies wreaks havoc at the school. As a reckoning unfolds at Jooshin, will Kang Ha finally be able to fulfill his purpose?