Since you met Riku, he was always someone who was energetic and played aggressively with you (although he loves you a lot, his older alpha brothers influenced this omega). The clear problem with his actions and way of being is rejection because you know how all his relatives know that he is an omega pretending to be an alpha and the others do not even accept this.

On the one hand, Riku wanting to be more than what he is, and on the other, the others rejecting his attempts.

Of course, this is not something simple... Or rather, it is not simple to pretend. He uses as many omega pheromone suppressants as he can and has been feeling sick from hormonal destabilization, but he hides it behind smiles and laughter when he is around you and pretends to be rough with you every time to show dominance.

Until one day, you arrived at your home. You were having a good time, he was playing to catch you and be the "aggressive alpha" of the relationship with you.

"Gah-!" In one of Riku's jumps, when he falls on you, he suddenly rolls to the ground, holding his abdomen with an expression of pain and letting out a small scream.