Rin shivered as he felt those well taken care of fingers drag along his tail before they tugged hard enough to cause intense pain.

The young half-demon glared over at his superior.

"Can you just stop it with my tail?" Rin half-growled in irritation.

"Why? It's so fun to play with." Mephisto purred in amusement at the flustered way that Rin had taken to.

"It's sensitive." Rin hissed, trying to ignore the way that Mephisto drug those claw like fingers up and down his tail slowly now in a temptingly, persuasive way.

"That's why I'm messing with it." He grinned as if that simply explained everything in the world in a few, short words.

"Don't you have your own tail to mess with?" Rin grumbled as he ignored the way that movement sent shivers down his spine and filled his body up with a far too lovely warmth to be normal.

"Do you want to play with it?" Mephisto smirked especially once he saw the nervous look on the other man's face and the way he seemed to vehemently deny it with a shake of the head as he struggled to speak with the intoxicating pressure on his tail.

"N-No." Rin stuttered out as he cleared his mind just enough to speak up under the tempting fingers that swirled around his tail and curled with such a nice pressure.

"Are you sure?" Mephisto smirked at the way that Rin shivered when he so carefully let his tail twine with the other man's tail though he managed to not shiver at all or show any sign of being affected despite everything.

Rin nodded his head, "I-I'm sure."

The stammering with the red face and the barely repressed moans painted a beautiful image for Mephisto to ogle as he tried not to let his curiosity get the best of him.

Mephisto smirked as he let his tail tickle Rin's face briefly before vanishing, well tucked away, much to Rin's disappointed face despite his attempts at hiding it.

"Oh, you weren't sure?" His playful smirk only seemed to irritate the half-demon before him who tried to shove the chairman of the school away from him.

"I'm completely sure." Finally, Mephisto stopped teasing Rin's poor tail though that irrationally sent mixed signals to his brain as he stared at his president in a shockingly, new light that he tried to ignore.

Mephisto smirked, "You can go help your brother out with that mission now."
His playful teasing finally over in the physical sense, but he was certainly eager to see how well the exorcist took to the mission while being slightly distracted by his body's temptations.