Tsubaki Mochizuki, an omega and captain of the school's judo team, regularly clashes with alpha karate captain, Ruuji Ishio, in their shared gym. However, a heated argument leads to a joint punishment and a warning from Ishio. He cautions Mochizuki to be wary of his omega pheromones and confesses his attraction towards him as an alpha. Despite protesting, Mochizuki wants nothing to do with Ishio after feeling belittled by him. Mochizuki plots revenge and chooses to sexually harass Ishio, unaware of his true feelings. However, danger lurks around the corner, and there are greater threats to Mochizuki beyond Ishio's attraction.