There is a thing between the secondary genders.

If too many Omegas want a certain Alpha, each will start courting the Alpha in their own ways.

Like bringing gifts, trinkets— keeping the Alpha company, interacting often,etc..

And the Omega that impresses the Alpha the most will make the Alpha return the act of courtship and court only that Omega.

That was happening to Katsuki.

Izuku could feel jealousy spark in his gut as he watched some girls get close to Katsuki. Izuku's omega chanted: **Alpha ours.'*.

Katsuki just wanted to go to his dorm and those obsessed omegas won't leave him alone..

Not like Izuku would,either.

Katsuki was grumbling towards the 3 girl omegas who were obviously trying to court him,until he saw a familiar mop of green hair come over..

”Move aside,” Izuku's words hit the three girls like cold water. ”He's not interested." He added,and by his strong displeased scent that wafted like poison,directed with a clear threat in the air, the 3 girls clearly knew how to take the hint and scurried away quickly.

Izuku's scent switched to normal when the girls finally left, and he turned to his beloved Alpha. ”Are you okay, Kacchan?” He said, making sure to flutter his eyelashes in a way that accentuated his doe eyes.

Katsuki corrected himself mentally.. 4 omegas who were trying to court him.

Yet the 4th one didn't seem like a bad option.

”M' fine.” He answered gruffly, observing the Omega's antics.