Here is your passage rewritten to sound smoother and more natural, while keeping your exact story and meaning the same.
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Gans dragged Liam to his room and locked the door behind them. He threw him onto the bed and began touching him, forcing Liam to feel every movement. He leaned down and kissed him slowly, his hands moving along his hips.
Liam woke with a soft moan. "Ahh…"
Gans rubbed him hard until he climaxed.
"Wow… your body is different from the others," he said in amazement. "Today I'm going to make you mine — mine and only mine. I'll mark you and you'll be my mate forever."
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Meanwhile, Sora sat in his room, worried about his brother, while Ren leaned on his shoulder and complained.
"Sora darling… I feel awful."
"And why should I care right now? Can't you see I'm worried about my brother?"
"That doesn't matter. It feels like you're trying to run away from me, aren't you?"
"Says who?" Sora challenged.
"See?" Ren said, making a childish face.
