One day after school, the class representative, Usui, witnesses Yuma, a popular alpha at school, doing the nasty. His partner is the bad boy, Ichita. After finding out the pair's secret,Usui gets dragged into a messed up relationship from that day forth... With the birth rate continuing to decline, they live in an era where omegas are revered. However, behind that is an unimaginable reality.+