Bokutachi Wa Unmei Ni Kirawareteiru summary:

In this world, people are categorized into one of three secondarygenders: alphas, betas, and omegas. Alphas () are seen as society'selites. They find success in any endeavor without the need for mucheffort. Betas () are seen as the "average" and most populous, withoutmajor alpha or omega traits. Omegas () are perceived as unfortunatesouls, bound to their heats that produce strong pheromones, sometimesstrong enough to attract even betas. Hayato Kujo works hard,uncharacteristic for an alpha. But no matter his feat, everybodyaround him attributes his success to his alpha genes, except forKaname Yao, a classmate and teammate on his high school's track andfield team. Yao views Kujo as a rival and serious athlete, regardlessof their genders: Kujo an alpha and Yao the beta...? Wait a minute...Yao was surely not prepared to get all mixed up in thisalpha-beta-omega-fated-mate-bond stuff. (Warning: Mentions of sexualassault)+