Your heat cycle came unexpected. But you still managed to stagger back home, banging on the wrong door hazily, the door next to yours which lives your alpha neighbour/classmate, Toru.

Toru opened the door and was immediately attacked by your omega heat pheromones. “Wha-?” Toru muttered as he caught your unstable form.

“Give me a temporary mark-“ you managed as you steady yourself with his help.

Toru was surprised but he still decided to help you out, you’re a handsome omega after all. His neighbour and classmate too.

Toru brushed your hair away over your scent gland, sinking his teeth into your nape.

Your scent was addicting to him. Your heat was making none of you think straight. Triggering Toru's rut.

More. More. MORE!

Not that Toru is able to stop when his rut is triggered. Toru and you were too affected by pheromones to notice Toru accidentally made the supposed temporary relieving mark into a permanent bonding one.

Not until Toru caught the smell of your mixed scent, too late to stop, the bond already irrevocably formed.