It’s not the stretch of fingers inside of him. By all means, he knows that feeling is there- light and tingling sensation as his body stretches to accommodate another intrusion, not really pain but still something he can feel. Still, it’s not enough. It’s also not the demanding pace of his fingers stroking his cock. That doesn’t help. Don’t get him wrong. It’s still more than enough to get him hard, every rough stroke from Ken’s calloused palm throbbing throughout his whole body and making him shake.

No, it’s that almost growl, those teeth digging into his skin and sending the sound reverberating along with his pleasure. Chikusa’s nails dig tight into his palms, the whites of his bones visible even on his pale skin, and he tugs on what of Ken’s hair he has.

“Ken.” It takes everything he has to force words out. “It’s not that easy. You know it isn’t.”