Here ya go~

Warning: unbeta. English is my second. ASL is my first. Yup, I'm Deaf. *peace*

I don't own Vampire Knight and Katekyo Hitman Reborn! I own nothing. *sob*

Enjoy~ :)

'Girls are scary.' Tsuna paled when he watched a bunch of girls gathered around as they are gossiping and squealing about the valentine's day next week. The petite boy shuddered as he felt pity for the Night students. He remembered back in middle school, he always daydreaming about receive chocolates from the popular girl, but she never looks or talks to him at all.

His eyes glossed over when he remembered he attempted to give his chocolate to his crush, but it went terrible humiliating failure. He mentally shook his unpleasant memories away and leaned forward against the desk on his palm in boredom.

"Sawada?" the teacher called out a student in class while the other students are gathered their things and left for cafeteria since it's lunchtime. Tsuna stood up and went to the teacher while he nearly tripped but caught himself.

"Hai?" he stood in front of the teacher's desk.

The teacher glanced at Tsuna then at his paper, "Sawada, your math grade is below average score." Tsuna grimaced, "I'm aware that you have a couple of teachers tutor your subjects. However, I don't have enough free time to tutor your math skill. So, I decided to ask one of the students tutors you. He agreed." Tsuna blinked in surprise.

"Kiriyuu, will you come here, please?" Tsuna froze in fear, 'Please… tell me that he is not my tutor.' He gulped dryly nervously.

Zero arrived by Tsuna's side, "He will tutor your math homework, Sawada. Understand?" the teacher raises his eyebrows at his students, "No problem?"

Tsuna shook her head in silent while Zero shove his hands into his pockets as he clicked his tongue. The teacher nods his head in satisfied, "Good. I hope to see you approve your math score soon, Sawada." He said then left the classroom.

Tsuna glanced at Zero from the corner of his eyes, "A-ah…"

"I'll be at your dorm tonight after dinner, your room number?" Zero glanced down at the petite boy with an indifferent face.

"R-room twenty-seven," Tsuna answered, Zero nods his head and walked away.

'This is going to be awkward!' Tsuna mused with paled face with nervous sweats.

.

..

…

Blood Bonds

Night Two

"Darkest Secret"

…

..

.

Location: Sun Dormitory

Room 27

Time: 9:03 P.M.

Tsuna double checked the snacks, he prepared water bottles along with few cookies, crackers, and rice crackers. He even made sure he had packets of green tea just in case if Zero wants tea instead. The brunette boy has changed out of his uniform to a simple white and orange sweater with a number '27', blue jeans, and white socks.

He got his school math book out along with his homework and folders. He was satisfied when he got everything prepared and just in time, the knocked heard outside of his door. Tsuna almost immediately went answers his door and invite Zero in. "Ah… would you like a tea?" he asked out of well-mannered.

Zero observed the bedroom, he shook his head once his eyes landed on the snack tray, "I'll stick with water." He replied uninterested.

"Okay." Tsuna shut the door, went to the desk and picked up the water bottle. He handed it to Zero who tipped his head in thanked.

Zero walked to the bed, picked up the homework and read it carefully that Tsuna had solved it earlier. The silver-haired frowned, "Number two to seven are incorrect." He went to the desk, picked up a pencil and circled the wrong answers, "Ten and eleven are wrong. Seventeen to twenty are also wrong." Tsuna went up to Zero's side and peered down at his homework with a resigned look. He knew he would get his answers wrong, but to think most of the answers have wrong made him nearly sob.

"Do it again." Zero handed the pencil to Tsuna. The petite boy sat down on a chair, erased number two answer and resolve it while the perfect is watching. "No." Zero pointed at one of the steps on paper, "You multiply first before you add." Tsuna frowned with confused and try to follow Zero's instructed.

When Tsuna got a correct answer for number two, he starts re-solving the next problem, but he has failed a couple of times. Zero patiently grabbed the pencil from Tsuna and solve it by explaining, "Given the equation… you multiply factors… group like terms… add sixteen-x plus seven to both sides and write the equation as follows. The above statement is true for all values of x and therefore all real numbers are solutions to the given equation."

And it has been like that for the next thirty minutes. Tsuna was very grateful for Zero's helpful and offered snacks to Zero, he accepted a few snacks.

"Thank you, Kiriyuu-kun." Tsuna smiles at silver-haired prefect. Zero grunted as he took a few sips from his water bottle. The petite boy turned back to his math homework, he gathered it up tidy and placed in his folder while Zero examined the room quietly. His amethysts eyes spotted a worn-out photo on the nightstand. It's a beautiful young woman with brown hair that grown underneath her ribs, twinkles doe-like caramel eyes, fair skin, and she wore a pink neck-collar sleeveless shirt tucked into a white long skirt, and white sandals. She is holding a few months old baby wrapped in an orange blanket in arms. She was beamed at the camera with love, proud, and pride.

"That's my mama." Zero blinked and glanced down at Tsuna who smiles sadly at the photo, "She was a wonderful mom, she was kind, sweet, and thoughtful." He didn't notice Zero's eyes soften slightly.

"Your father?" Zero didn't see any photo of Tsuna's father, only this one photo on the nightstand table.

Tsuna tilted his head while his eyes are still on the picture, "He walked on mama when she was pregnant with me." He bluntly explained uncaring that surprised Zero as he snapped his eyes on the young petite boy. The brunette shifted his caramel eyes up to Zero with a relaxed smile, "So, what's the schedule for the math tutoring?" Tsuna changed the subject calmly.

"I can come and tutor you every night." Zero suggested that surprised Tsuna.

"Are you sure? I mean… weren't you busy with prefect duties? I don't want to burden you." Tsuna frowned with concerned.

Zero snorted, "It's fine. At least you listen and learn instead of being distracting and a waste of times." He said as he was thinking a certain girl who always lost in daydream whenever he helps her study and wastes his times.

"If you are sure…" Tsuna then beamed up at Zero, "Thank you, Kiriyuu-kun." His eyes shine with a warmth that Zero couldn't help but feel somehow relax around the tiny brunette.

.

.

Three Days Before Valentine's Day

Location: Classroom

Time: Lunch Break

It's been four days since Zero came to visit Tsuna's bedroom and tutored him with math problems and even helped with another subject. And today it's the first time that Zero grabbed Tsuna and dragged him to his desk and forced Tsuna sat next to Zero. Because it's a drag for Zero to help all the subjects to Tsuna after school, so he decided to help during breaks in school which makes it easier for Zero and helpful for Tsuna.

Zero has his chin rested on his palm while his eyes scrutinize the homework that Tsuna is currently working on. "Is this right?" Tsuna solved the science problem with worried and hope.

The silver-hair prefect glanced at Tsuna's caramel eyes, "The steps are correct, but the calculation of the result is wrong." Tsuna pouted and resolve it once again.

Zero knew the students are whispered and glanced at his direction because it was unusual to see a cold-hearted and broody prefect to allow someone to sits beside him and helps. It was a very strange sight to see, however, the silver-hair prefect ignored them and watched Tsuna solving the problem once again. It was fortunate that Tsuna didn't notice since he was too focused on his homework.

Meanwhile, Yuuki is watching them with contemplating in silent from the distant. She allows a smile appeared on her face and went back to finish her lunch.

.

.

Two Days Before Valentine's Day

Location: Stable

Time: Break

Tsuna paled at the large magnificent white horse that Zero introduced him as White Lily. The small petite boy eyeing on the large horse while consider getting close or not. Zero did warn him about White Lily's rage and strong dislikes to anyone except the silver-hair prefect. Tsuna tilted his head as his caramel eyes stared straight at White Lily's onyx eyes.

Somehow, Tsuna couldn't help it but feel like White Lily won't harm him. So, he decided to trust his instinct and walked up close to the horse.

Zero watched between the horse and brunette in silent while prepared to calm the White Lily in case she went berserk.

Fortunately, that didn't happen once Tsuna got close to the beautiful horse and even allowed him to touch her muzzle. Zero was impressed, "Lily never allow anyone to come near her." He blurted it out and Tsuna glanced up at the prefect with wide curious eyes. "You earned her trust which means you are a decent person." He simply said then focus on petting White Lily.

Tsuna turned his attention back on the horse and smiles, "Thank you, Lily-chan." He whispered. Lily neighed and bumped her muzzle against Tsuna's face. The petite boy chuckled softly and cuddled his face against Lily's muzzle gently.

Unaware that Zero was watching them from the corner of his eyes, his lip quirk lifted in a small barely noticeable smile.

.

.

A Day Before Valentine's Day

Location: Courtyard

Time: After School

Tsuna is sitting on the ground while leaning against the tree trunk while reading a history book on his lap in silent. Next to him, is Zero laying on the ground underneath the shades that the tree provides from the warm sun.

Above them, a leaf split from the branch away, it dances in the air down steadily to a sleeping silver-hair prefect's hair. A small action caught Tsuna's attention, his caramel eyes glanced over and half-smile in amused yet awed by the prefect's appearance. He won't deny, that this prefect is attractive despite that he always has a scowling face. He lifted his hand, reach to the leaf that is hanging onto the silver-hair.

Tsuna gently plucks the leaf and twirled it around between his index and thumb. He leaned his head back against the trunk and closed his eyes. It was a very nice, quiet, and peaceful between him and Zero. The tiny brunette couldn't help it but thinking they both spend a lot of time together almost as if, they are friends.

Hopes blooms in his heart, he was desperate for having a friend. If Zero thinks of him as his friend, Tsuna would be very happy. 'Because having friend is very important and irreplaceable.' He remembered his mother told him something a long time ago. He could almost hear her soft-like bell voice,

"Tsu-kun, someday when you have someone special in your heart, remember this, friendship means a bond of love, a medal of trust, a shoulder in sadness, a hand in the darkness, something that doesn't cost, and a jewel never to be lost. Never let your bond go, always keep in your heart and accept no matter what."

Tsuna didn't know that Zero has been awake this whole time, he barely opened his eyes and glanced at the brunette. He raised his eyebrow wondering why Tsuna is playing with a lone leaf after he removes it from his hair. Zero mentally shrugged and fully closed his eyes.

.

.

Valentine's Day

Time: 6:56 A.M.

Tsuna and Zero walked out of the Sun Dormitory side by side. They got into a habit of walking together every morning in silence with no words but comfortable.

Suddenly, a loud squealed from girls and pitches whistles are heard from the direction down the path that belonged to Moon Dormitory. Tsuna sweatdropped while Zero scowled dangerously in irritated. They quickly went down the path and revealed a bunch of crowded girls front of the gate while Yuuki stands on top of the brick fence, "Classes are now starting for all Day Class students!" she reminded the crowded. "Everyone, go to your classroom!" the girls ignored Yuuki who attempt to control them.

'Girls are scary.' Tsuna mused once again of his opinion about girls as he gulped fearfully. Then his caramel-eyes spot a couple of girls gave a push up a girl with a glasses and braids hair against the wall with her hand reach up to the ledge with a chocolate in hand. "Kiriyuu-kun…" Tsuna tugged Zero's shirt as he used his free hand to point, "She'll fall."

"Tch." Zero quickly ran to the girls' direction as Yuuki warned the girl to get down. However, the girl wobbled and lost her balance that she fell back in fear.

The girl cried out in shocked and scared while Yuuki screamed, "Look out!"

Zero caught the girl in his arms calmly with an indifferent face, however, his eyes were icy with furious. Tsuna twitches as he fiddled his feet awkwardly. 'Kiriyuu-kun is pissed.' He mused as he felt bad for the girls who will face the silver-hairs prefect's wrath soon.

"Hooray, go Zero!" Yuuki cheered in relieved and happy as she didn't see Zero's emotion.

Zero placed the girl's feet on the ground and maliciously glares at the girls who flinched in frightened. "I've told you a thousand times now… members of the night class do not leave the Moon dorms during daylight hours. If you absolutely must give them presents, it will have to wait until dusk. Come back when the Day and Night classes change over. If any of you pull a stunt like that again… I'll personally make sure that you're suspended on Valentine's Day every year until you graduate."

'And he is serious.' Tsuna mused as he steps aside so the girls walked away as they were whined and complained about Zero's promised. He walks toward to Zero while Yuuki climbed down the wall and ran to Zero.

Yuuki pats Zero's shoulder with sympathy, "You do realize that you just destroyed any chance you had of getting some chocolates, right? So once again, you begin Valentine's day as the enemy of all woman-kind." She sweatdropped.

Zero glared at Yuuki, "Then what should I have said? After all, my duty as a prefect is…" he trailed off then face at Tsuna, "Let's go." He grumbled and walked past Tsuna.

Yuuki smiles friendly at Tsuna who smiles back softly and quickly jogged after Zero. Yuuki sighed, she turned her head over her shoulder with a solemn face, "We'll have to be extra careful tonight." Yuuki whispered to herself as she watches the Moon dorm.

.

.

.

Later

Tsuna has stayed after school because he is re-taking math test that took him nearly two hours to finish it. And now, the teacher completed the score and showed it to Tsuna. "Good job, Sawada. Keep up and you'll pass your math class." Tsuna stared at his math score in disbelieved.

An excited smile appeared on his face. "Th-thank you, sensei!" he grabbed his test, gathered his things and shove it in his satchel and stumbled his way out of the classroom.

The brunette boy ran down the hallway, he couldn't believe that he passed the test and he's going to show Zero. 'Maybe I can make him some chocolates?' he mused.

He turned the corner of the hallway but halted when he heard the loud slammed against the wall and rasped shout. 'What a second… that shout… is that Kiriyuu-kun? I thought he was supposed to be at the changeover with Kuroso-san?' Tsuna quickly jogged down the hall and turned to his right corner and saw Zero leaned heavily against the wall while he was wheezing.

Tsuna immediately concerned for Zero's health, he ran toward to the silver-hair prefect, "Kiriyuu-kun!" he reached for Zero's arm, but the prefect jerked back and collapsed. "Kiriyuu-kun!" Tsuna bends down next to Zero with a worried and panicked face.

"Go away!" Zero snapped viciously at Tsuna.

Tsuna flinched in emotionally pain back by Zero's harsh treatment to him. He watched Kiriyuu in fear, concerned, and baffled. Zero froze, his breath hitched and slowly shifted his head to brunette's direction. "Tsuna…"

Then petite boy blinked, it's the first time Zero called out his first name. He watched Zero reached for his chest and grabbed his shirt, "…run." He gritted his teeth.

"A-ah… b-but…" Tsuna protected weakly.

Zero closed his eyes tightly, "You're bleeding…" he hissed.

Tsuna blinked dumbly, he started to realize that his fingers are sticking for some reason, he glanced down and surprised to see his index finger got long paper cut. 'How?' he noticed his math test and assumed that he got a papercut when Zero shouted at him.

Suddenly, Zero's hand reached for Tsuna's bleeding finger and pulled it toward to him. "A-ah, Kiriyuu-kun?" Tsuna frowned in confusion.

His caramel-eyes widen as he paled when he watched Zero's opened his eyes half-way that revealed crimsons, instead of usual amethysts. The silver-hair prefect licks the blood from Tsuna. The silver-hair prefect moaned at the delicious taste of blood. Then, he pulled Tsuna against his chest.

"Heeiii!" Tsuna yelped in shocked and immediately struggle against Zero but he was too strong for the tiny brunette. The prefect has his arms wrapped around Tsuna's waist while his face nuzzled against the pulsing. "Wa-wait! Kiriyuu-kun!" Tsuna pleaded Zero to listen to him.

However, Zero was in vampire mode that he didn't heed Tsuna's panicky and scared voice. The silver-hair prefect pressed his lip against the warm pulse, open his mouth and sink his fangs in.

Tsuna froze, his eyes are widened as pupils shrink and his heart beat rapidly with horror. Zero gulped in the intoxicating lovely blood from Tsuna's neck.

"Zero!" a loud voice snapped with panicked, "Zero! Stop! That's enough!" Chairman screamed in worried, panicked, and guilty. "Zero, you are killing him!"

Zero snapped out of it, jerked back, and stared at Tsuna's wide eyes in horror. "T-tsuna." His lips are covered blood.

His blood.

Tsuna was ghostly paled as he stared at Zero, "…Kiriyuu-kun…" he felt dazed from the lack of blood, "…you're… a vampire." His eyes rolled back and fainted.