Saiki K!

Alphas and Omegas [BL]
PK Academy was one of the few that allowed Alphas, Omegas, and Betas to coexist in the same classroom
Saiki's relentless pursuit of tranquility had forced him to pose as a Beta. Even though he could change his appearance with his many psychic powers, he preferred to remain a Beta, an ordinary person unable to perceive another's scent unless it was perfume or chemicals.

Everything gradually changed with your arrival. A simple Omega, you weren't swayed by scents or carnal desires. You were focused on your studies, too ordinary to attract anyone's attention. But you did. You caught Saiki's eye, and that was enough. You were simple, ordinary, just as Saiki had always wanted.

He preferred to change his caste to that of an alpha when it came to spending time with you, even though he knew you weren't interested in pheromones like others.
(⁠⊙⁠_⁠◎⁠)

Today was one of those days; they were paired up in a cooking practice, preparing and coordinating their movements with each other.