A/N: Trigger warnings- underage kissing, suicide, emotional manipulation.

Ever since Chuuya was young, he had a friend. His friends name was Dazai, and he was the worst friend in the universe, according to Chuuya. He always made fun of Chuuya, pushed him around and got him in a lot of trouble. According to Chuuya 'shitty Dazai' should just curl up and die.

But Chuuya had to admit, at least to himself, that wasn't true.

Because Chuuya and Dazai were friends. They had been together as long as Chuuya could remember. Dazai didn't speak about himself all that much though, so Chuuya didn't really know where he came from. And the day he figured it out was the day everything changed.

"Chuuya?" Chuuya looked up his teacher, frowning softly. He was eight and it was his first day in his new school. Dazai was going to the same school as him and was currently standing with Chuuya, poking him in the back. Chuuya smacked him hand away, earning himself giggles from the class. A stern look from the teacher made them fall silent. "Why don't you introduce yourself?" the teacher continued.

Chuuya stepped forward, smiling nervously at the class. "My name is Chuuya," Chuuya spoke out. "I'm eight years old and I like to draw. I use to live somewhere else but my dad needed money so we came here instead."

"Good job Chuuya," the teacher said, smiling. "Why don't you go sit down now?" Chuuya nodded and went to the empty seat the teacher gestured to. Dazai still stood at the front, waiting to be introduced. "Now class-" the teacher stated to say, but Chuuya quickly spoke up.

"You forgot Dazai Miss." The entire class giggled and the teacher's face turned slightly red.

"Dazai can sit down," the teacher said after a moment. Chuuya was confused why Dazai didn't have to introduce himself, but didn't dwell on it. Instead he pulled a chair over to his desk so that Dazai could sit with him, which he did.

The morning went by okay, other then Dazai poking Chuuya some more and muttering insults to him. Chuuya only pushed him away or hissed insults back, ignoring all the stares the duo received- he was use to it by now. NB arrived and Chuuya went with Dazai into the hallway, as they both opened their lockers to get their lunches.

Suddenly, a group of boys walked by. They paused by him, whispering. One moved forwards hesitantly. "Why did you keep talking?" the boy asked him.

"Oh, sorry, was I bothering you?" Chuuya frowned, looking down. Great... "See Dazai, I told you not to poke me!"

"But Chuu-ya!" Dazai whined, pouting and crossing his arms. "Class is boring!"

"I don't care if it's boring!" Chuuya glared at Dazai, who glared back. After a moment Chuuya sighed, looking back over at the boy. "Sorry about that..."

"Why are you-?" the boy tilted his head, eyes wide. "Are you um, like, insane and stuff? Because you're talking to air."

Before Chuuya could reply, assuming it was a joke, Dazai stepped forward and pushed the boy, hard. The boy was sent flying backwards and onto his butt, ans tears filled his eyes. Just as the teacher came out of the classroom the boy started sobbing, yelling, "Chuuya pushed me!" as loud as he could.

"What?" Chuuya eyes widened in shock. He hadn't touched him! "I didn't push him!" Chuuya fought, grinding his teeth. "Dazai did!"

Nevertheless, he was sent to the corner and Dazai didn't get in any trouble at all. Dazai never got in trouble. It wasn't fair.

And that was the night Chuuya was told by his parents that he was the only one who could see Dazai.

For a long time Chuuya was just confused. It didn't make any sense to him. Why couldn't anyone else see Dazai? Whenever he asked Dazai the other boy would only shrug before quickly changing the subject to something else.

But life with an imaginary friend wasn't really easy.

Kids always made fun of him and Dazai. And then when Dazai shoved or hurt the kids, he was always the one who got in trouble since the children had only seen him.

"Dazai you need to stop hurting people," Chuuya said when he was alone with Dazai inside his room. His parents didn't like it when he talked to Dazai, so he had to try and only talk to him when they were alone.

Dazai huffed, putting the toy he was holding down and crossing his arms. "I only hurt them when they make fun of you and tell you lies," Dazai snapped. "I'm real, you believe me, right?"

Chuuya nodded- of course he believed Dazai. The eight year old didn't know any different. In his mind he could see Dazai and touch Dazai and talk to him, and that clearly made him real. "But I'm the one who always gets in trouble," Chuuya muttered. "It's not fair!"

"It's because they don't like you." Chuuya paused, eyes growing wide in hurt and confusion. "All the other kids just think you're a freak," Dazai continued. "And the teacher pretends not to but she agrees. Your parents don't like you either- they wish you were never born. Are you crying? Crybaby..."

Chuuya covered his face- he was crying. But that couldn't be true, right? Sure all his classmates and his teacher and even his parents looked at him strangely, but they couldn't hate him hate him... "I'm the only one who likes you," Dazai spoke. He moved forwards, hugging Chuuya. "Stupid Chuuya. I'm the only one you need, okay?"

"No!" Chuuya shoved Dazai away. The boys eyes grew dark with anger, and just then Chuuya's parents came into the room. Chuuya was full on crying now and quickly ran over to his parents, hugging them and wailing about how Dazai was being mean to him.

That was when Chuuya's parents started to put him on medication.

The medicine made it hard to talk to Dazai, but at first Chuuya didn't really care because he was still mad at him. But after a while Chuuya begun to miss his best friend, and he just wanted him back..

"Dazai?"Chuuya whispered, a few months after he had started taking the medicine. Dazai sat in front of him, but he kept blurring and Chuuya couldn't hear his words. For the first time, it scared him.

The next morning Chuuya held the pill under his tongue until his mom wasn't looking and then he spit it into the garbage.

And that night, Dazai was clear again. Chuuya hugged Dazai tightly the same way he had hugged his parents, crying softly. "Dazai," Chuuya sniffled. "I missed you!"

Dazai hugged him back, a smile on his lips. "See?" Dazai questioned. "You're parents are playing with your head, they don't love you... Only I do."

And it was then Chuuya didn't trust his parents anymore.

And he didn't take the medicine anymore either.

Dazai was always hurting people, but Chuuya knew if he blamed it on Dazai he would have to take more pills, so he took the blame now. It was alright anyways, it just made his parents mad at him and it made him stand in the corner a lot, but as long as he had Dazai he was okay.

Dazai was the only one who loved him anyways, right?

He had to visit the principal once. It was scary but Chuuya knew Dazai would protect him. Besides, Dazai kept muttering about how the principals hair was clearly a wig making Chuuya laugh.

The principal was worried about him, but Chuuya told him everything was just fine. "He isn't really worried for a shorty like you," Dazai commented, making Chuuya pout and shove him. Dazai shoved him back, smirking. "It's just his job," he continued. Now come of Chuu-ya~ Let's go play!"

Though, one time Chuuya did hurt someone. It wasn't his fault, but they made him really angry. Chuuya didn't normally get mad when people made fun of him but it was different because this time they made fun of Dazai and friends are suppose to protect each other.

"Are you talking to your fake friend again?" one of the boys asked him when he accidentally hissed at Dazai in class. Chuuya quickly shook his head no, trying to look as innocent as possible. "Why are you so obsessed with him anyways?" the boy demanded. "If he's like you he's stupid and ugly anyways."

Everything seemed to flash red and Chuuya quickly lunged at the kid, shoving him to the ground. His hands wrapped around his throat as if moving by themselves and he squeezed tightly. He could barely notice that the other boy was squirming, struggling as his face turned red.

Then Chuuya was ripped off the child, and sent home.

It was only when Chuuya was in front of his parents when he burst into tears. He hadn't meant to hurt the other boy, it was like he couldn't even control himself! When he told his parents they didn't understand though.

"Chuuya," his mother had said, knelling in front of him and taking hold of his shoulders. "Your father and I are going to talk this out, alright...? Go to your room."

Chuuya went to his room quickly before falling onto his bed and crying. Dazai moved over, slowly sitting on the edge of the bed. "Chuuya," Dazai muttered. "Don't be like that~ You did a good job!"

"I hurt people!" Chuuya sobbed into his pillow. "How is that g-good...?" Chuuya sniffled for a moment before sitting up more and wiping as his face. "No one at school will ever talk to me again!"

"Isn't that good?" Chuuya paused, staring at Dazai with wide eyes confused by his words. How could that be good? "It wasn't like they were nice to you in the first place," Dazai pointed out. "You hurting them just showed the message they need to back off. It's a good thing. It's not like he was that badly hurt, and now people won't be mean to you."

"And if they are..?" Chuuya asked slowly. He wasn't crying as hard now, and seemed to be listening to Dazai's words instead.

"Then you hurt them again." Chuuya quickly went to protest, but Dazai held up one hand silencing them. "What's the worse that can happen?" Dazai demanded.

"What if they die?" The words came out in a squeak, Chuuya panicking slightly again. "I could squeeze really hard and not notice and then they could die!"

"And?"

"And!?" Chuuya stared at Dazai, eyes growing huge. "Killing is bad!"

"Why?" Dazai moved closer to Chuuya until their faces were almost touching. His normally soft brown eyes were sharp, the way they looked when he got mad and Chuuya went to flinch back but Dazai grabbed him, holding him in place. "Why is killing bad?"

"B-because-" Chuuya cut himself off, confused. Why was killing bad? "It hurts the other person," Chuuya finally tried. "And people would be so sad and they would miss them!"

"It's their own fault though, isn't it...?" Dazai sighed slightly, still keeping his grip on Chuuya tight and their faces close. "They deserve it. You're only delivering justice. What's the worst that can happen?"

"I could go to jail!" Chuuya shuddered, twisting and trying to escape. Suddenly Dazai shoved him down, climbing onto him. Chuuya stared up at him, eyes dark and full of tears.

Dazai watched the red head for a moment before sighing again. "It doesn't matter if you go to jail," he finally said. "Because I'll be with you. And I'm the only one you need. Right?"

The 'right' in Dazai's words sounded dark, dangerous and it made Chuuya whimper. Dazai was scaring him. But... Dazai was the only one who loved him. Dazai had told him so! So... "Right," Chuuya whispered, believing Dazai.

Dazai slowly smirked and his eyes turned soft and warm again. "So would you kill?" Dazai questioned, leaning down so that their faces were close again. Chuuya shyly nodded- it made sense after all, right...?

Suddenly Dazai pressed his lips against Chuuya's. Chuuya wasn't bothered, he use to do it with his parents. But when Dazai suddenly licked his bottom lip Chuuya jumped slightly, confused. It felt strange, and slimy.

Dazai did it again and Chuuya awkwardly cracked open his mouth. Dazai slipped his tongue inside Chuuya's mouth, growling slightly as he pressed closer. Chuuya started to squirm again- it felt weird, and he didn't like it.

But Dazai refused to pull away until he wanted to, so it was a few more moments before he did so. "What was that?" Chuuya squeaked, covering his swollen mouth.

"It means I love you."

Chuuya had been right- after that kids had started to avoid him. They looked at him with something like fear in their eyes, and if Chuuya got too close they would flinch away.

Adults watched him a lot more then they use to, which made it hard to talk to Dazai, but Chuuya managed. Once when Chuuya remembered how Dazai had explained killing and hurting people made sense, he had wondered if he could hurt the adults as well. But Dazai had said no, that adults were bigger and smarter and would just overpower Chuuya.

It made sense anyways.

A while passed, and Chuuya had his ninth birthday. And then he made a mistake. He mentioned the strange way Dazai had pinned him down and kissed him, and when his parents demanded to know how he knew that information, Chuuya had admitted Dazai had showed him.

He hadn't expected them to freak out.

He hadn't expected for them to start trying to make him get rid of Dazai forever.

Killing adults was hard because they were bigger and stronger, and Chuuya didn't really want to kill his parents. But they didn't love him anyways, right? And besides, Dazai had told him that if he put sleeping pills in their food then he could kill them when they were asleep.

They didn't even wake up when Chuuya put the pillows on their faces and pushed down until they stopped moving.

Then Chuuya went to bed. He couldn't go to school the next day because his parents were laying in their room and being smelly, so they couldn't make his lunch or drive him to school. Chuuya maybe could have walked but he didn't know how to tie shoes, his dad normally helped.

For the next three days Chuuya colored and ate junk food and played with Dazai, ignoring the strong smell from behind the door. But then food was started to run out, and Chuuya didn't know how to buy new food.

By day five Chuuya was hungry and the police were knocking on the door.

"They'll take you away from me forever if you don't follow my instructions."

Chuuya nodded and tied the rope like Dazai told him too before hanging it from the roof. Then he stood under it with a stool, and kicked the stool away.

"This way we can be together forever," Dazai said, smiling. Dazai really was the worst friend in the universe, Chuuya thought with a smile as his sight faded into nothing.