A/N: Enjoy!

"Thank You, Yamamoto-kun!" Tsuna said brightly

Yamamoto smiled weakly before the beaming smile of Tsuna. Just then, Reborn-sensei shouted "Tsuna-kun and Yamamoto-kun. It is enough! Stop flirting and concentrate in class!"

Giggles could be heard as Tsuna bowed his head low in embarrassment. Then, a cold shiver was felt by both to them. As they turned around, they could not help and notice the rows of concentrating eyes of their classmates.

'No one is looking at them' their minds silently whispered to them.

`This is weird.' Yamamoto thought.

Before turning back to lesson, he looked at the concentrating Mukuro suspecting that he was the one glaring at them. However, after a few seconds of observation, Mukuro did not even look at them and Yamamoto being him, just thought that perhaps, he was overthinking slightly too much.

Yamamoto back faced both Mukuro and Kyoko, then immediately Kyoko glared at Yamamoto.

`HOW DARE HIM! HOW DARE HE GOES AGAINST THE NO.1 MUKURO! I WILL MAKE YOU PAY EVEN IF MUKURO LET YOU GO!' The infuriated Kyoko thought silently to herself while balling her hands into a fist.

Meanwhile, after Tsuna turned back without suspecting much, Mukuro looked at his small back and silently chuckled to himself. `Just you wait MY DEAR HIME.'

Reborn-sensei's history lesson goes on as usual without Yamamoto nor did Tsuna notice anything until the bell ring, signalling the next lesson.

`Oh no! Today there is physical education!' Tsuna thought sadly, foreseeing himself failing at it and embarrassing himself.

'I hate exercising!' Tsuna thought in despair as he trotted to the gym.

(At the Gym…)

"Class, today we are running 2.4km. This is to prepare for your physical assessment next month. I hope that all of you have been training your stamina all this while or else this is going to be hard for you." with that said, reborn sensei looked at Tsuna grimly and shook his head.

"ready. Get set start!"

With a blow of the whistle, everyone started to run. Mukuro being the perfect student, excelled in running. With a pace breathing and fast speed, he led the class easily. Seeing the flawless Mukuro, a burning desire lit up in Yamamoto. He suddenly had an urge to win Mukuro regardless how one thinks of this test. 'I am going to win this.'' Yamamoto decided not to back down from this competition.

'Running is my second best sport after baseball. No way am I going to lose to someone who is not even in the sport club.' With a determined look, Yamamoto sped after Mukuro leaving Tsuna alone behind.

'mukuro…' Tsuna thought as he saw the back view of Yamamoto running after mukuro.

'wait! What am I thinking! After all he has done to me. I am worried about him? No way. No. anyway I better start running faster or else the girls are going to catch up to me.' Tsuna shivered at the embarrassment that he might suffered if he was too slow.

As one had expected, Tsuna really was too slow.

'hahahaha! Slow poke. You are still here? Are you a girl? Running at our speed?" Kyoko teased Tsuna mercilessly, while thinking back just now how Yamamoto and he went against Mukuro-sama.

Upon hearing that, Tsuna tensed up and started running at a quicker pace despite his heavy breathing. Seeing Tsuna was running slightly faster than before, Kyoko sped up. Although Kyoko did not seem like those athletic type, she was good at running. She won championship for last year running event too. Of course, Tsuna did not know this.

Tsuna and Kyoko took turn taking over each other. It was like a breeze for Kyoko but a hell for Tsuna. Soon, Tsuna felt very breathless as if air could not be pumped into his system. Small black dots appeared on his vision and the world turn black just then.

All Tsuna heard was Kyoko's scream and he passed out.

"… alright? Tsuna."

A buzzing sound was heard.

'there is no way I will be alright.' Tsuna thought and he blacked out once again after seeing a pineapple head bobbing in front of him.