Sinful Sensei

"Kufufu...Sawada Tsunayoshi, I would greatly appreciate it if you would pay attention. I'd hate for you to fail yet again due to your habit of paying scant attention."

The smooth, melodious and amused sound of Tsuna's English teacher brought him out of his reverie as he doodled on his paper, lost in thought as he usually was.

"S-sorry...Mukuro-sensei..." Tsuna blushed in embarassment, the other students snickering at him. All except his best friend Gokudera Hayato, who was glaring at anyone who dared laugh at his dear Tsuna.

"Just pay attention, Tsunayoshi. This next assignment is worth 50 of your final grade." Mukuro said sternly before getting back to the lesson he was teaching to the class.

Feeling his face turn a bright shade of red, Tsuna hid his face behind his copy of IHamlet/I as he tried to ignore the remainder of the snickers around the classroom.

It was really hard to concentrate when your teacher was so attractive and hard to avert your gaze from. He had the most interesting hair that Tsuna had ever seen. It was a dark-bright shade of blue, and the style in the back caused his hair to resemble a blue pineapple, and he had stated on the first day of school that it was his natural hair colour, since it was apparent everyone who looked at it thought it was dyed. His twin sister, Nagi-nicknamed Chrome-, who taught AP History, had purple hair, usually wearing it long or sometimes going along with the pineapple style.

He also had interesting eyes, which were mismatched. His right eye was red, and his left was blue. There were countless rumours about his eyes, but he never really spoke of them.

Tsuna had no idea why he seemed so attracted to his teacher, when he himself was A)Male, B)Straight and C)A failing grade klutz.

On the other hand, despite his failing grades, Tsuna was no idiot. He knew a lot more than people thought, and had a very unique way of interpreting someone's personality by just glancing at them, and easily recognizing someone if they were in costume. He also acted surprised and horrified a lot of the time, which was astounding to people.

He just didn't know why he was so gravitated to his English Teacher, Rokudo Mukuro, so hot and sexy, and had the attention of all his female students. Even if he DID like him, he wouldn't stand a chance.

I can't help it, there's just something about Mukuro-sensei... Tsuna thought, not quite realizing that he was eyeing his teacher quite intently. His back was facing him as he wrote something on the board, explaining some more of the assignment to the class.

"Is there something fascinating about my back, Tsunayoshi?" Mukuro asked as he turned around, having seen Tsuna eyeing him as he peeked at him over his shoulder, clearly amused.

A few students snickered as Tsuna turned beet red.

"N-no Mukuro-sensei...I was just..." Tsuna squeaked.

"Kufufu, just what?" Mukruro walked over to his desk. "Would you care to share it with the class?"

Shaking his head rapidly, he tried to ignore his beating heart. "Uh...n-no..."

The students laughed, and then the bell rang. The students eagerly gathered their materials as they prepared to leave.

"Class dismissed." Mukuro waved his hand dismissively and turned back to Tsuna. "Oh, and do stick around Tsunayoshi, there are a few things I need to talk to you about."

A rouse of "Oooh!"'s rang out from a few students as they piled out of the class, whispering among each other about what sensei wanted with Tsuna and if he was in trouble. Gokudera was feeling bad for Tsuna and wanted to punch their sensei for keeping him after class, and told him he'd meet him out front.

Once all the students had left the classroom, Mukuro shut the door and went to his desk to gather some papers together. Tsuna, feeling nervous, cautiously approached his teacher's desk.

"W-what did you want to see me about, Mukuro-sensei?" Tsuna asked, trying to sound calm, but his voice came out in a squeak.

"Well Tsunayoshi," Mukuro looked at him and smirked lightly. "I've been quite curious, and don't deny it, I have seen those...intriguing looks you've been sending my way lately."

"Eh!?" Tsuna blushed madly to his ears. "W-what are you talking about!?"

"As I said, I've noticed those looks you keep sending me." Mukuro leaned over his desk toward him a little. "I find it quite odd that you would give me such looks, Tsunayoshi."

"B-but I...I'm not...you see..." Tsuna stammered, unable to come up with a good alibi.

Mukuro's smirk widened, looking even more amused. "Kufufu...what's the matter, Tsunayoshi? Am I too attractive for you? Do I revert your attention from your classwork?"

"M-Mukuro-sensei, I..." Tsuna just couldn't find the heart to admit that he had a crush on his teacher. A male teacher no less.

Reaching over, Mukuro lightly took hold of Tsuna's chin with a couple of fingers, leaning toward him a bit closer. "It's okay...I can keep a secret, especially since you're not the only one in this predicament...kufufu..." And then he leaned over and closed the gap between their lips.

"Mph!" Tsuna gasped between their lips, his cheeks becoming even redder. He had not expected this, not in the least. Here he was kissing his own TEACHER. Teacher. Teacher and student kissing. It was wrong. So wrong. No excuse. Just wrong.

But Tsuna pushed all thoughts aside and kissed back, bringing his arms around his neck. He just couldn't pass this up, no matter how much his head was telling him to. His heart and body were urging him on. Two against one, haha. Guess who wins.

Pleased with the response, Mukuro leaned closer, kissing Tsuna deeper as he assisted in pulling him onto his desk when Tsuna attempted at climbing on to get closer. The kiss grew more passionate as Mukuro brought his student closer, snaking his arms around him.

Running his nimble fingers through his sensei's hair, Tsuna instinctively brought his legs around Mukuro's waist and they came up against the blackboard, their tongues in a heated battle for dominance.

Pulling back for air, Tsuna breathed a few moments before he re-attached their lips together. Mukuro tasted so unique, something like pineapple mixed with a dash of chocolate, and something else, but he couldn't quite place it. He liked it though, it was addictive.

"M-Mukuro-sensei..." Tsuna mumbled between kisses.

A rush of blood traveled down south as Mukuro heard his name spoken out so erotically, he loved it. Pulling back, he looked Tsuna in the eye, smirking. "No need for the suffix, Tsunayoshi-kun...I'm no longer you're teacher at this moment. We are simply two men..." Holding him tightly, he brought a hand down to the smaller boy's behind, squeezing it. "Enjoying each other."

"Uhn...Mukuro-sen...er...a-are you sure...? We...we're..." Tsuna began.

"Shh," Mukuro shushed him and kissed him again.

All logical thoughts were erased from his mind as they engaged into yet another mind blowing kiss.

Until a knock sounded at the door. They quickly let go of each other and scrambled to get their materials together, making it look as though they were getting ready to leave after having some sort of discussion or whatever.

"Mukuro? Are you ready to leave?" Nagi, or Chrome, came into the room, holding her jacket and bag. She noticed Tsuna and smiled. "Ah, hello there Tsunayoshi. Stayed after class?"

"Ah...y-yes..." Tsuna blushed.

"I was simply giving him some pointers for his assignment." Mukuro explained, fixing his tie. "You can go wait in the car my dear Chrome, I'll be there in a few minutes."

"All right, no problem!" Chrome nodded, and looked back at Tsuna. "Bye-bye Tsuna, you have a good weekend, I'll see you on Monday." She waved at him and left the room.

Phew. Both of them thought.

Once ready to go, Mukuro went over to Tsuna, slipping him some paper. "Follow the directions, be there tonight at 8." He whispered to him.

Nodding, Tsuna took the paper and stuffed it into his pocket, blushing madly as he followed his teacher out of the room.

This was going to be a long, eventful night.

I'll write a part 2 to this if I get enough demand. ;)