The First Meeting
Before you are informed on how the two zeroes fell in love you must be informed on their background. First, on how they got their epithet and the reasoning for such a huge bounty. Second, how after so long Cero and Zero met. Third, the reasoning for Cero and Zero going on a vacation and being a bit ragged. Yes, many things are to be known, but you must be patient because some things are outrageous yet plausible because it is the Grand Line and anything is possible. Anything is possible from mermaids to Devil fruits and Sky Islands to well any other weird thing in the Grand Line.
When Zero turned seventeen she set out to become a pirate. With all of her power she was able to make a name for herself in no time. She was known as "The Masochist" and in one year she killed half a million people so her bounty became 500 million Beli. On her travels she was a solo pirate until she arrived in her native island and met with her best friend Cero. Cero had also become a pirate and was known as "The Sadist" with a bounty of 500 million as well. He was on a break so he visited his home island. His bounty was so large because he was a pyromaniac and loved to torture people.
When the two met they couldn't help but fight to show off their skills. Of course it ended in a tie, but it was what reinstated their friendship. After going back to Cero's home castle they chatted and spoke of what they dreamed of doing. It seems they both wanted to have someone they could count on. So Zero devised a plan and Cero very willingly agreed. So they spent a month making alliances with all the minor crews in the New World and cut them a deal. After that they left to Paradise and made a pact with a lot of traders and in two months they became the golden couple and number one business partners in all the Grand Line. This made them a threat to the Celestial Dragons and World Government, but they couldn't do anything since they were invincible.
Later on that year the two got married. This made them the perfect couple, but in reality they were just best friends. Once they heard of supernovae heading to Sabaody Archipelago they decided to take a vacation since they were near the peak of perfection. Unfortunately they had a hard time traveling since they had to spend a week with the Celestial Dragons trying to be pleasant, even though they hated one another. Thanks to the mistrust they didn't sleep at night due to paranoia and anything they ate was in private out in Sabaody Archipelago. Now the two groups separated so they could have some fun. Both of them agreed to meet with the Celestial Dragons later that afternoon at the slave auction in grove one.
Cero was typically strolling around the groves knowing no one in their right mind would even think about messing with him. Well an uninformed pirate or supernovae might, but he could handle them easily. Then he saw a lady with determination on her face with some men and a reindeer. He saw they all had the same destination at the human auction so he decided to help them.
"They're with me gentlemen." Cero said and the guards ushered them all in. He looked for Zero immediately knowing he would face her wrath if he didn't explain his lateness to her.
Let's go back to Zero's day. She saw her little brother Luffy with a merman, mermaid, and a starfish. Of course she chose to ignore him since he'll get into trouble sooner than later. Then she saw Roronoa Zoro getting into a confrontation with a Celestial Dragon. So she decided to step in. Everyone looked at her nervously.
"Saint Charloss I thought your father taught you not to take something that doesn't belong to you." This got him irritated.
"What are you talking about Zero-sama?" He said utterly confused.
"That woman is one of my workers, she even carries my symbol." I showed the back of her neck which I made a mark while Charloss was distracted with Zoro.
"Apologies Zero-sama I had no idea the woman was your property." He said worriedly.
"See so it doesn't happen again or I will be forced to eliminate you for your impudence." With that I walked towards Zoro and saw how he picked the bloody man up to take him to a hospital.
"There is no need to do that Zoro I can heal him." So I did and then handed his wife to him.
"Be careful next time or you really will lose each other." I said to the couple whom nodded in gratitude. People were still staring at me so I simply walked away with apathy in my eyes and indifference in all of my movements.
By the time Zero arrived at the Auction House she saw there were seats in front of a pirate crew, the Heart Pirates, led by Trafalgar Law the "Surgeon of Death". It didn't bother her, but she was miffed that Cero was not here on time. When he did get here though, she made it a point to show her displeasure by commenting.
"You're late."
"Yeah, sorry about that kept seeing a lot of paranoid women."
"Ah, I saw a Celestial Dragon take one, but I stepped in to see his reaction."
"Let me guess extremely nervous and pleading with his eyes."
"Right on the dot, oh look a mermaid, I want it."
"Yes dear." Charloss then bid five hundred million.
"550,000,000!" Cero bid causing the Celestial Dragons to glare at us and all the World Nobles whisper worriedly.
"600,000,000!" Charloss bid as if challenging.
"625,000,000!" Zero bide causing uproar of worried whispers, but she put a maniac grin and they backed down. Next thing we knew Luffy was crashing in. The fish man tried to stop him from getting to Keimi, but was shot by Charloss instead. Luffy then proceeded to punch Charloss. This caused all the World Nobles to flee and for the Celestial Dragons to call for an admiral, but not before being humiliated even more. Then Rayleigh appeared after making the slave traders and Celestial Dragons pass out.
"Bravo performance Luffy, but I would've given you the mermaid anyway there was no reason for the overreaction." I said indifferently.
"Thanks sis." He said smiling like an idiot. That caught his crew's attention.
"She's your sister! /you have a sister?!" Is what they yelled.
"Your sister is the queen of the New World?" Nico Robin asked. To that both Cero and I rolled our eyes. Everyone then stared at us.
"Ah yes the zero series. They feel neither pain nor emotions and are born with the tattooed zero over their heart to show how they feel nothing. Usually they don't live past thirty five, but these two might be an exception. I mean they both made 14 trillion Beli in two years becoming even more powerful than even the Celestial Dragons." Rayleigh informed everyone making everyone look in awe and curiosity.
"You seem to have a point here Rayleigh." Cero said with a maniac grin nearly identical to mine. Luffy then noticed our wedding bands.
"You guys are married?!" He yelled.
"Yes, but don't worry it's only a marriage of convenience." Zero replied.
"Well you guys are the same you both have the same indifferent eyes." Luffy said noticing how alike we are. Then I heard Eustace "Captain" Kidd saying he would take care of the marines. This got the other two captains to follow him.
Cero was watching Eustace Kidd who for some reason was stealing all of his attention. Usually nobody except Zero could catch his eye. For once Cero felt drawn to somebody who was his complete opposite. Mister Eustace was expressive and blood thirsty but he could see a great intelligence inside of him. Oh well he could settle his curiosity later right now he needed to go.
Zero was attentively watching Trafalgar as he freed ex-captain Jean Bart. She saw he was injured and that could possibly affect his chances of escaping Sabaody. So she decided to help out. So she walked to him and put a finger to his forehead and healed him then left with the other two watching her. It didn't matter right now because she had to leave.
This meeting of interesting characters was unexpected for Zero and Cero, but they would investigate at a later date.