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His eyes opened of a sudden. Taken from his dreams, Senku's first thought was that the bedroom was way too hot, his skin completely taken by the glistening sweat, his breath fast and uneven. Maybe he should open the window. Unfortunately, the first thing he felt when he tried to move his body, was a strong wave of pain and pleasure.
His eyes widened upon hearing his uncontrolled moan, things finally starting to make sense to him. He was in heat. His breath got stuck in his throat when he felt the unmistakable smell of mint and chocolate from no one other than his alpha, (y/n).
Natural lubricant dripped from his pulsing entrance in an uncomfortable amount, his hand being used to stop his whimpers, the feeling turning unbearable. (y/n) was just beside him in bed, but because of his heavy sleep, he didn't wake up. It wouldn't take long for him to do so if Senku kept leaking so much lubricant.
It wasn't as if they have never had sex, but never during a heat or rut, because of the high possibility of a pregnancy. Being impregnated wasn't a bad scenario for a lust-blinded Ishigami now, it actually made him more excited.
"Damned omega instincts." The scientist thought, trying to control himself in the best way. He had to leave the room, and go to the second bedroom, staying there until the heat was over, or he would end up doing something they both could regret.
The idea was easier than the execution, though, and moving by himself at such a state was hard, especially when his deliciously scented mate laid beside him.
The burning feeling on his skin made him want to scratch it, but not a normal scratch. He wanted to be touched by (y/n), pleasured by him, fucked until he lost his senses. It was always like that on his heats, but this time, the thought was closer to reality than ever.
He bite his lip when his body moved on its own, his legs straddling his boyfriend that remained asleep, feeling the dormant member press against his ass. Senku's hands were put on (l/n)'s covered stomach, his green-ish, down hair obstructing a bit of his vision.
His stomach churned for him to move, to lessen a bit of the discomfort, to make his alpha's big cock ready to enter him. Just the thought of it made his shaft start to leak pre-cum.
With red sparkling on his brown eyes, a signal that the omega side was taking control, the Ishigami started to move his hips slowly, every move of his making him moan or whimper, his hand unsuccessfully trying to contain his sounds.
Rolling his hips a bit stronger, his heart almost left his chest when he saw his (l/n) stirring in his sleep. He wondered if he would get punished for doing something as dirty as that, but the thought of (y/n) angry at him was exciting, somehow.
