Katsuki and Izuku were together: two mermen in love with each other.

Every problem they had in their relationship,they resolved it. Even if it meant bonding,right?..

Izuku's inner omega has traded uncertainity with fury. They could get control over Izuku's body and act out upon their desire. But Izuku had quite the self-control..most of the time.

He couldn't just go up to his beloved and request for the bond to be done. He just had to wait.

The inner omega in him seeked the Alpha.