A/N: Buttsex, 'nuff said. Enjoy! And thanks for the reviews, haha! :D

Dedicated to klooqy. Thanks for the free internetz :)

Hibari went down and snatched up the delicious lips, eager to explore the herbivore's inside once again while throwing Tsuna's pants and boxers away. Tsuna, on the other hand, was once again busy melting into the kiss, savouring the moment without a care. They had gone too far to stop now.

While being distracted, Hibari decided to jump in for the kill right now, reaching down for the virgin hole down there, his fingers were already wet and sticky with Tsuna's cum. He then slid his middle finger, slowly and carefully, into the waiting entrance.

"Mmph!" Tsuna cried out in surprise and pain as he felt the strange intrusion going into his asshole, inserting itself slowly and wriggling around once in a while. He felt light-headed with the combined pain and breathlessness from the kiss, tears already forming at the edge of his eyes, feeling that this is too much.

'A bit more…' Hibari thought to himself as he momentarily broke off the kiss to concentrate on searching-

"AHH!" Tsuna eyes were shot wide open, feeling the burning sensation of the pleasure surge forward and shook his body, arching off the bed and clinging onto Hibari desperately, which made him sit onto Hibari's probing finger and once again hit the spot. Tsuna almost screamed at the unknown yet very powerful pleasure.

"Hmm." Hibari was pleased with the herbivore's reaction to his actions. Apparently the yaoi doujins confiscated from a giggling mass of fujoshis proved its usefulness. For once.

Lacking movement from Hibari's finger, Tsuna gripped onto his sleeves tightly and and looked below at the awkward and suddenly embarrassing position. He was not going to continue this, trying to reject the desire which he wanted badly now, while shifting uncomfortably around Hibari's finger, subconsciously clamping his inner walls onto it.

"So." Hibari started off matter-of-factly. "I can always take this out and walk away."

"No!" Tsuna responded a bit too quickly. Blushing at his mistake, he tried to stutter another answer, but another finger was inserted without warning and began to slowly stretch his insides.

"Nngh…" Tears were once again brimming his eyes as Tsuna felt an even more pronounced pain and rather uncomfortable feeling of him getting forcefully scizzored by Hibari. Before he could stop, the thired finger slipped in quickly and returned to finding that spot. Tsuna held onto Hibari's shoulder, trying to make it all better by rolling his hips around a bit and making the search easier.

A vocal moan and a hip thrust signaled Hibari to throw off his pants and underwear single-handedly (well, he IS Hibari Kyoya after all) and removed his finger. Dazed momentarily by the sudden loss of pleasure (and damn did it felt good), Tsuna was easily positioned, with his legs on Hibari's shoulder while the latter positioned his already-hard erection onto the slightly loose hole.

"Ready, Tsuna?" A nod. Hibari slid in slowly, enjoying the warmth and tightness of Tsuna's ass. He was sheathed completely in, ready to give Tsuna a ride of his life.

Tsuna responded with groans and hooked his arms behind Hibari's neck instinctively. Panting slightly, he gritted his teeth before grinding himself further in. The slight friction made the skylark jerked slightly in surprise; Tsuna was ready too. Thus it starts.

Hibari was being kind that day by starting out slow and steady, sliding instead of ramming into the small-framed herbivore, but Tsuna almost impatiently met his hips with a thrust, and both of their movements sped up increasingly till the room was filled with grunts, moans, slick slapping of thighs against ass and creaks from the couch.

"F-Faster!" Tsuna had long thrown away the doubts and fear of having sex with Hibari, only focusing the waves of pleasure the prefect was giving him. He brought himself higher, feeling his ass being abused by thrusts upon thrusts.

Hibari awarded Tsuna's compliance to his actions by giving another handjob, stroking Tsuna's wet and hardened member in time with his thrusts, making Decimo moaned long and loud for Hibari.

"AHH! H-Hibari..!-" Tsuna came as the pressure in his cock released, white hot pleasure etching into his mind and eyes. His walls tightened further around Hibari's still moving erection, and with one last thrust, came soon after.

Both of them panted heavily, face flushed, body hot and sweaty. Pulling out of Tsuna, he tiredly brought the sleepy boss into his arms, lying down on the couch.

"Hibari-sa- Ah, Kyoya…"

"What is it, Tsuna?"

"I…" He mumbled and blushed afterwards, snuggling towards Hibari and closing his eyes.

"…" And I love you too, Tsuna.

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Reborn smirked as he sat in the branch of a nearby tree. His student had his first time, in school, and unbelievably lost his virginity to Hibari Kyoya.

"Dame-Tsuna, you still have a lot to learn." With a glint from his onyx eyes, he jumped off and began to devise another onslaught of Spartan training.

A/N: I often wonder, it's kinda funny for two people to have sex and subsequently fall in love, only to have more sex. It's a weird logic, but hey, in yaoi, anything goes. P.S. Anyone up for a pineapple tuna sandwich? Tell me in the reviews so that I can come up with more sex :)