Rufus tries to pull his wrists free while fully aware that Tseng isn't going to let him free until he decides to, practically panting in ragged gasps at this point. It's agonizing ecstasy to be kept like this, just where Tseng wants him.

When Tseng pulls his fingers away from his cock he wants to growl and order Tseng to do what he wants but that wasn't going to get him what he wanted this time. He knew Tseng was well aware of what he was doing when he sucked on his lower lip like that and what it was doing to him.

He never would have considered begging for anyone else but Tseng somehow knew just how to draw each breathless word from his lips. "Tseng...I'm begging you. Anything you want..."