Okay from what I understand of the raws. Mc knows the older brother since his school days and always thought the older brother gave off pheromones now and then.
But it probably was the little brother who did that and since the older brother is a beta he couldn't sense it. Plus they lived together so the mc most likely sensed the pheromones of the little brother mistakenly thinking it was the older brother.
And mc jerked off to the older brothers voice was because the little brother gave him clothes doused in his pheromones and mc was linking that to the older brother because he thought the older brother was maybe an omega
Okay from what I understand of the raws. Mc knows the older brother since his school days and always thought the older brother gave off pheromones now and then.
But it probably was the little brother who did that and since the older brother is a beta he couldn't sense it. Plus they lived together so the mc most likely sensed the pheromones of the little brother mistakenly thinking it was the older brother.
And mc jerked off to the older brothers voice was because the little brother gave him clothes doused in his pheromones and mc was linking that to the older brother because he thought the older brother was maybe an omega