Start by Eating Jake Jake no Mi

After screaming with all of his might, Masa took a deep breath, feeling exhausted and disgusted. He was a man from the modern world, and this was his first time to kill. 

Or rather, was there any chance of him seeing a killing act except for ants or mosquitos in the modern world? 

Frankly, due to the experiences and memories of Masa from DxD and Mahouka, he felt slightly used to it since the two of them had killed enemies. 

Masa often hunted criminals on his territory, killing them.

Masa from the world of Mahouka was a magician, and the role of a magician in that world was as a tool, a weapon to protect the country, so it was natural for him to kill, especially when he was a man. 

While Masa from the world of Mahouka was often spoiled, he knew that in the world of Mahouka, one had to be cruel, or else his family would be targeted, kidnapped, and used for an experiment. Even if one died, their DNA would be kept and used as a tool to strengthen the country or a certain group forever and ever. 

Thinking of their experiences, Masa knew that he couldn't be merciful, and he couldn't be like Luffy, who just beat up the villains and then moved on to the next adventurer. After all, he didn't have a good background, a good father, grandpa, and brothers who would support him in case trouble came. 

Masa might not like to fight, and his goal was to live in a peaceful, stable, without much up and down, yet if someone wanted to pick a fight and mess up his peaceful life, then there was no need to hesitate to destroy them! 

Tapping his foot, a zipper suddenly appeared on the ground, then pulled the corpse, ready to erase the proof of his crime. 

Yes, this man might be a criminal, but it was better to be careful since a certain criminal activity was sometimes being supported by the Marines or the Noble. 

Always be careful; this is his creed. 

Taking the pistol from the man's hand, Masa wondered how to use it since neither Masa from the DxD nor Mahouka used such a primitive type of gun, but somehow, after a glance, he understood how to use it, considering how simple its structure was. 

Though, when he looked at the corpse that was about to be swallowed by the zipper ground, he thought, 'Should I try to devour it?' After all, if he really could devour someone into his body and gain their talents, abilities, knowledge, and other things, it was a good thing, right? 

Yet, when he saw how disgusting this corpse was, he decided not to do it, especially—

"Weird, there should be an alley here, and that guy should have been running to be this—" 

Before the man finished his words, he was pulled by something and then slapped directly, causing a zipper to form on his lips, then close tightly. 

"—?!" 

The man was stunned and panicked, realizing the role of the prey and hunter had been reversed! 

Yet, Masa thought that this was a good target to try the power of the Jake Jake no Mi. Ignoring the man's frightened expression, he tried to create a string from his jacket, which he tried to connect to the man's brain, trying to get the memory of the man from knowledge, skills which he learned, and many other things. 

If it was before, it might have been difficult since he didn't have much knowledge regarding the brain, memory, and other things, but due to Masa from the Mahouka, who mostly learned about the brain and nerve system due to his family's magic along with three times of learning ability due to their ability, while there was a difficulty in the beginning, he was able to learn it. 

Still, instead of learning everything, he just learned what he wanted to know, and as for how this ability works, if he gave an example, it would be like a string phone. 

By connecting his jacket's string to the brain of his target, he could learn what he wished by asking directly into the brain, especially when Masa from DxD, who was a devil, could do memory manipulation and hypnosis magic. 

Still, while those abilities were strong, the target had to be weakened first or even lose their consciousness since if they didn't, naturally, they would fight back. 

'It's like a data transfer.' 

Masa felt strange, but after he learned about the criminal's group, the number of people, the leader, the hiding place, and many others, his expression became ugly. 

"Doflamingo?" 

Naturally, he knew Donquixote Doflamingo, one of the most famous villains in this world, yet he didn't expect that he would encounter this guy right away in this world. 

Slavery. 

While this type of business wasn't illegal, anyone could kidnap people to be sold as slaves, especially for those countries that didn't pay tax protection from the World Government, known as the "Heavenly Tribute." However, in a place where the country paid the tax, naturally, it was illegal for people to kidnap others to be sold as slaves. 

Yet, even so, there were still many who did it, especially when the World Nobles, nobles, and even marines were involved in this business. 

The Doflamingo Pirate was just one of them, and naturally, they didn't work as slave business owners; instead, they let others manage the business and then took a percentage of the profit in the name of protection. 

"Sabaody Archipelago..." 

Masa muttered the name of this place.

While this place was a good place, peaceful, especially with a Marine Base located nearby, there was something known as a lawless area within this place, and the Marines, or others, who screamed about justice every day did nothing and just let this place do anything as they wished. 

Couldn't you just destroy everything, killing all of them, so no one would commit any crimes in this place?! 

If the World Government could destroy a country with a "Buster Call," then why couldn't they do the same in this place? 

If the "Buster Call" cost too much money, then why didn't they use admirals such as Aokiji, Akainu, or Kizaru?

If one of them came, then would the people in those lawless areas dare to do anything? 

"It's strange..." 

People in the Marines kept talking about justice all the time, but in the end, their work was like this. 

If that was the case, then they might as well not call themselves a justice, so it wouldn't give people hope. 

Yet, Masa also knew that to make people willing to work for the Marines, giving this organization an image of justice was necessary. 

Money alone isn't enough to make a Marine throw their lives away, after all, and a feeling is necessary. 

Taking a deep breath, if it was before, Masa might not have cared since he was also such a selfish guy, and what he wished to do was just to go to the East Blue, having a harem life in that place, but since this place had messed him up, then don't expect him to let them go! 

The man, who Masa had caught, had woken up but realized that he wasn't killed, which made him sigh in relief, thinking that Masa would let him go, yet soon, he saw a frightening scenery that made his body shudder! 

On the man's body, there was a huge zipper on the back, and this zipper was open, causing his entire body to become flat like a piece of clothing. 

"—?!" 

The man tried to scream, but he couldn't since his mouth had become a zipper. He tried to move, but he couldn't since his body had lost control, and soon, his being was robbed. 

Masa entered the body of a man and turned the man into a jacket. Patting his face softly, he felt weird, but he walked out of the alley and looked for a mirror or a glass to see the reflection of his face; then, as expected, he had become the man he had worn previously. 

Yes, at this moment, no one could guess that he was Masa, especially considering how handsome he was originally. 

"Hey, Boris, what are you doing? We have to search for that guy, or else the boss will get angry! Boss Disco wishes to make that guy a gift, you know?" 

"Oh? Boss Disco?" Masa, who had become the previous man, looked at the man's acquaintance, who appeared in panic. 

"Yeah... you might not know, but one of the cadres of the Doflamigo Pirate is here, you know?" 

"Cadre? Which one?"

"If I am not wrong, it should be Machvise-sama?" 

"Machvise?" 

"Yeah, Boss Disco said that Machvise-sama will be happy with that guy as a gift."

The man showed a strange smile and didn't notice Masa, whose expression had become blank. 

"Hahaha, but I am sure that guy will be happy to become the pet of a strong man like that—" 

Yet, before the man finished his words, he had already lost control over his body and mind, becoming Masa's mindless doll. 

Yes, like Doflamingo, who could control people with his Ito Ito no Mi, Masa could do the same with Jake Jake no Mi, and naturally, his control was higher, especially when Masa from the world of Mahouka gave him knowledge about the brain and nerve. More importantly, unlike in the world of Mahouka, he didn't need to fear that others would treat him as a criminal since, in this place, there are no rules for the strong! 

One person became two, two became four, and then all the people that he controlled increased even further to thousands of criminals. 

Yes, Masa didn't hold back and controlled thousands of people directly and had them hold various weapons: cannons, guns, knives, a dagger, a sword, a fork, and even a chopstick. 

All of them walked like an army, and they all moved toward Disco's slave shop and other slave shops. 

Watching all of that from a far distance, Masa stared at everyone coldly, and in his mind, there was only one thing that they had to do, and that was to destroy everything! 

Yet, what he didn't know was that a thief-like figure noticed him and had been staring at him curiously from a far, far distance. 

---

There is one more later.