You Are My Alpha (manga)

Shunya and Ryota are honour students attending a prestigious high school exclusively for male alphas. And while their alpha nature places them at the top of the social hierarchy, these two friends hope to one day create new medicines that help omegas instead and put an end to the discrimination they face. But everything changes in an instant when Shunya suddenly manifests as an omega himself and goes into heat! With his best friend now vulnerable to attack by their alpha classmates, will Ryota be able to protect him and realise their dream?