Ryu- This is for NeoGene. Sorry for the delay. I'm hoping it's Adult!Reborn, cause, well, it'd be hard to do it in his baby form.

A Surprising Future

Tsuna was sleeping quite peacefully, that is until Lambo and I-pin ran into the room. They were arguing, as usual, any moment, Lambo would probably trip and then use his Ten Year Bazooka, except one problem, Lambo tripped, but his Ten Year Bazooka came out of his afro.

"Hiiii!" Tsuna shrieked before it hit him. When the smoked cleared, Tsuna found himself on a bed in a very big and elegant room. "Oh, my future self must have been asleep." Tsuna said as he lay down.

"You know, you should really check your surroundings before letting your guard down."

Tsuna looked and saw Reborn, well, an older version of him, but what surprised Tsuna was not the sudden appearance, but the lack of clothing Reborn had on, which was none.

"Hiii! Reborn! Why are you naked, and in the same bed as myse- my future self!" Tsuna shouted.

"Jeez, you really are dame-Tsuna. What do you think?" Reborn said.

Silence hung in the air as Tsuna thought, a minuted later, a light bulb went on. "W-what. I had sex with you!?" Tsuna shouted.

"Bingo." Reborn said.

"But that can't happen!" Tsuna said.

"Why not?" Reborn said.

"Well for one, you're my tutor, and another, well, I can't really think of another." Tsuna said.

"I was your tutor, and as for another thing, sex isn't that bad. I can show you right now." Reborn said as he grabbed Tsuna and began pulling said person's pants down.

"We can't, and even if I was willing, which I'm not, there's less than five minutes left!" Tsuna shouted as Reborn was successful in pulling down Tsuna's pants.

"Don't worry, I've already had a few quickies with your future self, so I knew all the spots to set you off." Reborn said.

Before Tsuna could protest further, he felt something slick enter him. When Tsuna turned his head, he could see Reborn using his fingers.

"This would be much easier if I had some lube." Reborn said as he removed his fingers and positioned Tsuna and himself in place, and before Tsuna could utter a word, Reborn entered him.

True to his word, Reborn was hitting places that was causing Tsuna to see stars and feel jolts up his spine.

Tsuna moaned when Reborn retreated, and he gasped when Reborn came back in, and since Tsuna had first arrived, Reborn had been keeping track of time, he had a little less than two minutes now, so Reborn quickened his pace, causing only moans to escape.

As soon they reached their limit, the release of their seeds came first, and then a puff of smoke. When Tsuna opened his eyes, he saw the younger Reborn staring at him.

"So, who were you having sex with?" Reborn said in a deadly tone.

Tsuna turned red and began to sputter, deciding not to say anything else, Tsuna pulled his pants up and ran out of the room.

-End-

Ryu- Well, hope this is to your liking.