Everyone knew that costars Bellamy Blake and Clarke Griffen did not like each other. The tabloids and the gossip magazines all had ran stories on it. They avoided each other at premieres. They put on a good face when they had to do press stuff together. However it was completely obvious that they did not like each other one bit.

Bellamy and Clarke both were what his agent said was called pity cases. Clarke was a born to a B-list actress, and became a child star in her role of the movie The Woodshed. Her father died when she was only six years old. Her mother never got many roles and apparently often tried to take Clarke's money. When she was 18, Clarke officially emancipated herself. Bellamy's mom had received the news that she had cancer when Bellamy was 16 and his younger sister was only 13. Bellamy started going to auditions to try to make some extra money to pay for the hospital bills. Luck was with him, and he got a minor role in a movie at an open call. Afterwards the offers started flooding in. His father had left when he was 2, and he had never seen him until his mother died and he came forward wanting custody of Octavia. Thank god Bellamy won that case, and Octavia became under his care.

Now he was 24 and Clarke was 22. They were both on the hit show Dagger. Clarke was the protagonist, a girl who is trying to go to college while also being the town's superhero. Bellamy played the boy next door who finds out her secret in the first season, and then becomes an accomplice in the second. Their on screen relationship was good. Clarke's character depended on Bellamy's a lot, but off screen they couldn't stand each other.

That was until The Kiss happened.

...

"What?!"

Clarke had just shouted what Bellamy was thinking.

"The fans want this," Marcus said, "Olivia and Nathan were bound to get together at some point."

"But why?" Clarke huffed, "I thought it was decided at the beginning of the series that this would never happen! I thought the whole point of having the character of Hunter was to be Olivia's love interest."

Marcus sighed. "That was the point when this show started. But we weren't aware of the overwhelming fan base Nathan was going to have. Our research shows that 75% of the fans want Olithan to happen, opposed to the only 10% of fans who want Huntiva."

"Whose the other 15%?" Finn Collins, the actor who played Hunter, said.

"They either don't care, or they want Nathan and Hunter to be together."

Bellamy let out a hearty laugh and winked at Finn from across the table. Finn gave him a sour look and glanced back down at his script.

"The point is," Marcus continued, "We want to please our fans. If we keep putting off the having a romantic moment between Olivia and Nathan than we might start to lose fans. We will see how they react to the season finale, when Olivia and Nathan share their first kiss, and then see from there how their relationship progresses.

With grumbles from both Clarke and Bellamy and especially Finn, it was agreed that Olivia and Nathan would have to have a kiss together.

...

They always say that the best on screen kisses were when both the actors acted natural. Bellamy knew that it was impossible to be natural when there was a dozen camera's in your face and lights were shining brightly on you.

At least that's what he used to think.

The day of the dreaded kiss came and Bellamy was in a bad mood. He had signed a sworn secrecy agreement, so he couldn't even tell is sister what was going to happen on the show before it happened. Octavia knew he was dreading this day and was trying to pry it out of him what was going to happen.

Clarke gave him a dirty look when he arrived on the lot. He returned it.

They were filming in a remote location up in the mountains. Nathan and Olivia were supposed to have driven up there in his old pickup truck after she had almost been beaten by the villain.

He went and got his makeup on and changed into his clothes. Soon it was time for the big scene.

"Do we need a practice take?" Marcus asked.

Both shook their heads.

"I don't want to kiss him any longer then I have to," Clarke said.

"Same for me," Bellamy remarked.

"Fine," said Marcus, "It better be good. Get in your places."

Bellamy sat on the back of the truck and Clarke sat beside him.

"Quiet on set. I want camera one to stay close on them, camera circle round, camera three pan out. Ready? Action!"

"Olivia I know something is wrong. What happened at the marina?"

Clarke gave a fake sniffle, tears welling up in her eyes. "Nothing."

Bellamy reached over and lifted up her chin with his finger so her eyes met his. "Olivia, I've known you for a year now. You know you can trust me."

Clarke pulled away from his hand and looked down again. "I know Nathan. It's just- The Illusionist almost beat me. I would of died if it wasn't for your diversion. I just realized I'm not as strong as I thought I was. One of these days, I could be crushed or stabbed or-"

"Olivia stop. You are the strongest human I've ever met. You won't ever lose. And you know how I know that? Because you are the most compassionate and caring person and that's why...that's why I love you."

Clarke looked up with shock in her eyes. Bellamy pushed back a strand of her hair out of her face. Her eyes sparkled at him, and his heart tightened, or Nathan's did. He started moving his head closer to hers, slowly tilting his head. Clarke, Olivia, closed her eyes as he came closer to her. His eyes trained on her face until seconds before his lips touched hers, and then he let them flutter shut, waiting for the space between them to close.

His lips brushed up along hers. A shudder ran through Clarke's body. Bellamy lifted his hand up and put it on the back of her head, pulling her closer. Clarke opened her mouth a fraction of an inch, and Bellamy took the opportunity to deepen the kiss.

Suddenly he couldn't remember what the instructions were. He didn't remember if he was supposed to bring his other hand to her waist, or if Clarke was supposed to bring her hands up to his shoulders, digging her nails into his skin, as her tongue clashed against his. Or if to ease the awkwardness they felt being twisted around, if Clarke was supposed to reposition herself so she was on top of his lap, and he would lean back until they were laying in the truck bed.

It wasn't until after a loud throat clear had he remembered that they were in fact front of several cameras and couple dozen people.

They pulled away, breathless and staring at each with incredulous look in their eyes.

"Well, that's not exactly what was supposed to happen," Marcus said looking dumbfounded, "But it will do much better."

Clarke pushed herself off of him and jumped off, leaving a very confused Bellamy laying in the pick-up.

"I need a break," she said, before grabbing her water bottle and walking off set and into the dressing trailer that was parked not far away.

Bellamy picked himself up and got down from the truck. Several other cast members who had come to watch were standing not far away.

Jasper, who played Clarke's quirky brother named Charlie stood with his mouth open in shock.

Raven, who played the town's reporter, was laughing.

Finn looked like he wanted to punch someone in the face. Probably Bellamy.

Marcus looked down at his schedule. "Well we probably won't get that much passion in another take, so let's see if it will work."

Bellamy stood off to the side while Marcus watched it on the tiny screen. It did look good. More than good. It looked authentic.

"I think that will work," Marcus said, "I guess we finish the scene with Hunter and Charlie lost in the woods, and then we can call it a day".

Bellamy glanced to the trailer where Clarke had disappeared into. He pushed through the crew and made his way there.

He walked in to Clarke leaning up against the makeup counter, scrolling through her phone. She must of kicked out the wardrobe staff. Her head shot up when he walked in.

"Oh. Hi. Sorry, I just needed to uhm-" she struggled to finish her sentence.

"It's fine," he said, "I just wanted to tell you that Kane said that shot will work. We are done for the day."

A sigh escaped her, and her shoulders relaxed a bit. "About that scene," she started, "I don't know why that happened that way."

"It's alright," Bellamy smirked, "I have that effect on the girls I kiss." He wasn't sure where this was coming from, but there was no stopping it.

Clarke rolled her eyes at him, pulling one of her classic disgust looks at him.

"God, you're such a douche. It wasn't that good sunshine."

"Are you sure?" Bellamy said, stepping closer to her. Clarke put her hands behind her back and gripped the counter tightly. "Because the marks you left from digging your nails in my back beg to differ."

A ghost of a smile crossed her lips. "I'm sorry did I hurt you?"

"You can't hurt me," Bellamy said, "But I am definitely better than Collins was, wasn't I?"

"Slightly," she shrugged.

Bellamy bent his head down, his lips brushing over her cheek.

"Maybe I should give you a little reminder," he whispered, before going to her neck and kissing her softly. A moan escaped Clarke's lips, and she grabbed his head and pulled him up to meet her lips. He grabbed her by the waist, drawing him to her and then picking her up.

Clarke wrapped her legs around him, as she ran her fingers through his curls. He walked backwards and used one of his hands to lock the door of the trailer.

...

She had told him it was a onetime thing. That obviously neither of them had feelings for the others, and it was just sex. That it was not going to happen again.

But after Bellamy's last scene of the season to shoot, the one where he was sitting at his computer figuring out what the illusionist's weakness was, Clarke was waiting for him in his trailer.

"I thought it was just a onetime thing?" he said, with an amused look on his face.

"Shut up," she said, before pulling him to her.

So the onetime thing became a two time thing. And then a couple weeks after an interview, it became a regular thing whenever they were somewhere together. But it was still nothing. Just fun.

And then they didn't see each other for awhile. They both were doing other things, and there never saw each other.

When the season finale aired in May, Bellamy was watching it in his loft. And when the final scene came on, he realized that he kind of missed her.

Octavia called him screaming.

"HOW COULD YOU NOT TELL ME THAT NATHAN AND OLIVIA GET TOGETHER?!"

"The contract O, you know I couldn't."

"THIS IS SUCH GREAT NEWS FOR ME, TUMBLR IS BLOWING UP BELL! EVERYONE LOVES IT! Also I think I ship Hunter and Charlie, is that weird?"

Bellamy snorted. "Yeah I bet Collins would love to have a scene like that with Jasper."

His phone dinged, and he saw he got a text from Clarke.

Want to come over?

Apparently she had missed him too.

"Sorry O, I have to go." He hung up before she could protest.

...

It was at an awards show a few weeks later when Bellamy finally admitted to himself that he didn't hate Clarke Griffen.

Finn had come behind Clarke and pulled her in for a photo. Bellamy felt his stomach drop. It barely calmed him down that Clarke looked uncomfortable with it. As soon as she pulled away Bellamy went over and put his arm around her waist to pose for photos.

He was afraid she was going to shove him away. After all, as far as the public knew they still hated each other. And he was pretty sure that Clarke felt that way too.

But to his surprise she smiled and didn't shy away. Finn's face gave a fraction of a frown, before being all smiles again and going to talk with a reporter.

Bellamy decided he wasn't going to let her leave him that night. They posed together, talked to reporters together.

"You two are very friendly tonight," one commented.

Clarke gave her a fake smile. "What are you talking about, we are always friendly towards each other?"

When it was time to go inside, Bellamy put his hand on the small of her back to lead her in.

As soon as they were out of ear shot of any reporters, Clarke turned to Bellamy.

"You are being a little possessive aren't you?"

Bellamy responded by pulling her a little closer.

"I just don't like seeing another guy acting like he is with you."

Clarke grinned. "I thought this was just casual hookups. I can be with Finn in public if I want to"

Bellamy lowered his mouth to her ear, growling so only she could hear, "After this I'll show you why you are with me not Collins."

She shuddered, making Bellamy give her a satisfied smirk.

...

They announced his name for best supporting actor in an action show. And to his and the world's surprise Clarke Griffen leaned over and kissed him on the cheek when he won.

And when Clarke won Best Actress in an action show, he leaned over and kissed hers.

Octavia called him about it in the morning.

Clarke had just left his when she came barging in his apartment.

"YOU AND CLARKE ARE A THING WHY DIDN'T YOU TELL ME YOU TWAT I TELL YOU EVERYTHING!"

"Calm down O, we are not a thing I promise."

"But why did I just see Clarke leave the buil-OH MY GOD YOU'RE FUCKING YOUR COSTAR."

When Bellamy didn't say anything she hit with a pillow. "BELL! When did this happen?!"

"I really don't want to have this conversation with my little sister. But that day we filmed the kiss..."

"I KNEW IT WAS REAL!"

Bellamy sat down on the couch. "O, it's nothing more than costars with benefits."

Octavia snorted. "Please, everyone saw you on tv last night. I think it's a little more than that."

Bellamy shook his head. "You are so full of shit."

Octavia shook her head. "There's gifs of it all over tumblr. Everyone thinks that you two are dating, they are calling you Bellarke."

"That's a stupid name."

"I'm serious, here I'll show you."

In a few minutes Octavia had pulled up a video called that had every "Bellarke moment" from last night.

"Yeah look here brother, the fans see that glint in your eye when you are looking at her. And look here, the way her face lights up when she glances over at you. And look when she sees you won, that is pure love right there."

"I think the whole lot of you is looking way too into this," Bellamy replied. But he couldn't help but kind of see her point.

...

"Want to go to a movie tonight?" Clarke asked nonchalantly one morning, while laying in his arms.

"I thought this was just purely casual sex?" Bellamy said, running her fingers through her hair.

Clarke rolled on her side so she could face him.

"I think we both know that's not the case..."

Bellamy looked into her eyes, waiting for her to say she was joking. To say that she was lying. But her eyes shone, and he could tell she was being honest.

He pressed a sweet kiss to her forehead.

"Yeah. It never has been."

...

When Bellamy told Octavia that Clarke and him were a thing now, she had shouted at the top of her lungs "BELLARKE IS REAL!"

...

At Comic Con that July Bellamy didn't let Clarke go. Finn gave him dirty looks as usual, but he ignored them. He was just a little bitter that the writers were thinking about having him date Charlie.

There was going to be a lot of Olithan this season.

Clarke and Bellamy were asked lots of questions about their relationship during the panel. They were happy to answer all of them.

Yes they didn't get along when the show started.

Yes at the awards they were together.

No there is no tension between Finn and Bellamy because Nathan is dating Olivia and not Hunter (though that one stretched the truth a little bit).

"What was your favorite scene from last season?" a girl asked.

"Definitely the scene in the back of the truck," Clarke said, "Because now I can show people the exact moment I fell in love with my boyfriend."

The crowd erupted in awwws when he bent over and gave her a peck on the cheek.

He had to admit it too. That kiss had changed everything.