Demonstration

Although it was still slightly odd to Ichigo that his father was the person teaching him these wonderful little sexual tricks, most of him just shrugged it off and stuck it in the category of more of his father's insanity. He couldn't really hold it against Isshin when everything the man had taught him had only helped improve his relationship with Renji.

Not only that, but his Isshin's latest set of lessons had been very helpful with his fighting ability and had improved his stealth abilities as well. Not to mention is was kinky as all hell. Renji had asked him how he finally managed to stop leaking spirit energy all over the place and Ichigo had flushed and said his father was giving him lessons.

Renji had raised an eye at the blush, but had uncharacteristically not pushed the issue. Ichigo should have known that meant his lover was up to something.

The first time Isshin had given Ichigo this particular lesson, he'd been too horny to pay proper attention. It had been right after the felching lesson when Ichigo was hot and hard and leaking and ready to be fucked, so he hadn't been able to concentrate on anything but the feel of his father's fat cock in his mouth and the feel of Isshin's reaitsu pushing into his ass, stretching him wide, filling him up.

The feeling of the cock in his mouth and one in his ass – even just one made of soul energy – had made him wonder if maybe he could talk Renji into a threesome sometime. He liked the feeling of being taken from both ends and thought it would be even better with two real cocks to fill him up. The idea of having two different cocks coming in him at the same time made him rock hard every time he thought of it.

It had been about three months since that first lesson, and now Ichigo was sprawled in his father's desk chair, both legs spread wide over the arms of the chair, his asshole in clear view below his balls. Isshin sat on the couch along the wall, legs pulled up on the cushions beside him, his body also spread out for Ichigo's view. Ichigo moaned as he felt Isshin's reaitsu push into his ass, the steady in and out of it almost distracting him from his task of using his own reaitsu to lick and suck at Isshin's cock and balls.

It was this sight that Renji pushed open the office door to, startling Ichigo out of his concentration and making him yank his reiatsu from his father hard enough to make Isshin yelp. Renji's presence sent Ichigo's mind spiraling into his fantasies of a threesome, and although he flushed slightly at being found this way, he couldn't stop now if his life depended on it.

"Didn't anyone ever teach you to knock?" Isshin demanded of Renji, not letting up on the use of his energy to fuck his son's delectable ass. He kept pushing it in hard, pulling out slow only to slam it back in harder than before. He watched as Renji's eyes glazed over merely from the sounds Ichigo was making and grinned.

"Want to try it?" he asked. "It'll be good for your control too."

It took Renji a few seconds to understand what he was hearing. "What? This is what you did to teach him how to control his reaitsu?"

Isshin smirked. "Got a better idea? This requires his utmost concentration. If he's not careful, he could really hurt me, or even kill me," Isshin responded, still using his reaitsu to pound his son's ass. "You want to try this on him or me?" he continued.

Renji had to admit Isshin had a point. He looked over at Ichigo, licked his lips at the spread legs, at the way Ichigo arched into the reaitsu fucking he was getting, then looked at Isshin whose cock now looked neglected since Ichigo couldn't seem to focus any more. He walked over to Ichigo and grabbed his head, kissing his lover until he had his attention.

"Next time Strawberry," he growled, "you tell me when you plan to do this so I can be here. No more doing this without me." At Ichigo's nod, he stripped out of his clothes and turned towards Isshin. "Where do you want me?"