12-13 years before luffy's journey start...

Ch. 1: Mariejois is on fire.

Late at night.

Marine Headquarter, Marineford.

"I will end the era of pirate in this generation."

"The entire sea will be safe and stable under the rule of the World Government."

Sengoku, who had just become fleet admiral stared at the world map with satisfaction.

"Fleet admiral Sengoku, it is bad news."

A panicked Marine rushed in "The Holy Land Mariejois has been invaded."

Sengoku's face suddenly changed "What did you say? The Holy Land has been invaded? Impossible!"

"Just an hour ago, an enemy invaded the Holy Land Mariejois, liberating all the slaves, and the Holy Land Mariejois was caught in a fire."

Sengoku's pupils shrank.

"Notify all Marine executives for an immediate meeting to see what's going on at Holy Land Mariejois."

"The specifics are unknown."

Sengoku's heart was trembling, something big happened, something that had never happened in hundreds of years.

"What are the Marine troops stationed in the Holy Land doing? Vice admiral Gion, where is she? Immediately contact her." Sengoku asked the marine.

"I just contact the marine stationed at holy land they say Vice Admiral Gion went to chase the enemy alone about hour ago, but there is no news about her now."

"WHO IS THE ENEMY?" Sengoku raised his voice, but no matter who, this is Unforgivable.

"The identity of the first offender is temporarily unknown and the accomplice is a fish man."

"Check, check immediately, we must not let them escape." Sengoku's roar echoed in Marineford.

.....

There is boat sailing at dark sea. Three girls are sitting together on the bow of the boat.

"We came out of hell."

The three sisters look back at the towering Red Line, with relief and hatred.

"The real difficulty begins now."

A boy around 18 years old who is controlling the rudder, reminds the three sisters who are crying with joy.

"My name is Koch, don't worry you three are safe for now."

Boa Hancock and her sisters looked at Koch gratefully.

"I am B..Boa Hancock and they are my sisters Boa Sandersonia and Boa Marigold and thank you for saving us."

'This is when the Empress Boa Hancock was teenager' Koch look at Hancock, who is little shy and helpless.

There is no style and aura of empress but the beauty is still there.

"What's wrong?"

Being watched Hancock felt slightly red, she look away not daring to meet Koch's eyes.

"Where are you going? If you follow me you will be hunted down by the World Government." Koch ask the three sisters.

Go where? Back to Amazon lily? There will be many problems and once the identity is exposed, it will bring disaster to the homeland. Sixteen year old Hancock with her two sisters looking at the vast sea and were loss for a moment. They have nowhere to go.

Hancock bit her lip lightly, looking at Koch with tearful eyes: "Can we…can we go with you?"

Now for the three sisters the most trusted person is Koch who rescued them.

"If you go with me, then prepare to be the enemy of the world government, do you have such courage?" Koch asked at them seriously.

Boa Sandersonia and Boa Marigold when they think of the world government were a little scared and hugged together.

Hancock being the elder sister stood up "For the slaves you are fighting against the world. How can I shrink back, I also have the strength, I will follow you"

The queen's demeanor is beginning to show.

Although they are all slaves, their situation is much better than other Celestial Dragons slaves.

Celestial Dragons almost all have slaves but their hobbies are different.

Some Celestial Dragons like to collect pirate captains, some Celestial Dragons like to torture and kill slaves, and some Celestial Dragons like to collect beautiful women of all races from all over the world and Celestial Dragons that capture Boa Hancock and her sisters were Indifferent to beauty they like to watch slaves kill each other and In order to increase the fun they will also feed Devil Fruit to slaves. Hancock ate Mero Mero no mi (Love-love fruit).

"Come on then." Koch held out his palm.

Hancock put her slender hand on his hand. Her face immediately turned crimson. Koch didn't pay attention to her because his attention was attracted by the system.

He was just a normal otaku from earth who died and reborn in the world of one piece, so of course he will have a system. 

[Boa Hancock joins the Pirates crew, Combat power +10369, Charm +9]

[Boa Marigold joins the pirate crew, Combat power +2314, Physique +5]

[Boa Sandersonia joins the pirate crew, combat power +2523, physique +5]

The system that Koch got is "The strongest female pirate crew."

For each additional member of the female Pirates, Koch gets the same increase in combat power of that member.

As the strength of the members increases, Koch will also increase the combat power by the same value.

At this time, Koch's total combat power.

[Koch: Combat Power 169058]

Hancock is the future Shichibukai and her two younger sisters are also very strong. They are still young and their future combat power will be very high. If they became stronger Koch will also become stronger.

Taking the risk and burning The Holy Land Mariejois and saving the slaves it's all worth it and the three Hancock sisters joined the Pirates crew it was not a loss...

PS: People may find the name Koch weird but it wasn't me who name him...anyway thanks for reading...and you can read this on Webnovel and fanfiction too.