"Huh?" Feeling slightly uncomfortable, a young boy awoke in an unfamiliar room.
"Where am I?" Looking around, the boy wondered to himself.
[ding!]
[integrating multiversal shop system!]
[system has complete integration!]
[now commencing memory integration!]
"Arggggghhhhhh!" Hearing multiple messages in his head, the boy let out a scream from the intense pain of memories entering his mind. Not able to handle the pain, the boy ended up passing out.
/8 hours later/
Regaining consciousness, the boy wondered if all he knew was real. 'Naruto? I've been reborn to another world?' the boy looked through his recent memories and was shocked to find out that he had been reborn in the world of Naruto!
After he died in his previous life, he was invited to join the shop system. After agreeing, he was 'reborn' as Zasu Doku in the land of hot water, more specifically, the hidden steam village.
What bothered him was that although he could remember his past life in the form of culture, movies, anime, books, light novels, etc. But, he couldn't remember who he was or his family; it seemed like anything about his past 'self' was erased.
Plus, from the information and memories he received, he knew that the system would keep his current body 'Sealed' until he reached 8.
His current 'life,' if you can even call it that, was of an orphan. His father had died before he was born, and his mother died during childbirth. So he was given to an orphanage until he was about 5. He was then sent to a casino in the village to help with maintenance.
It might sound cruel, but this is the world of ninjas, and if he were to be born in a ninja village, he would be in a much more hostile environment.
The hidden steam village wasn't a ninja village anymore, and it had become a tourist village for its hot springs, brothels, and casinos. Though there was still 'ninja' in the town, they were mostly village-hired handymen. If he chooses, he could apply to become a genin in the village when he turns 10. All he needed was to pass a physical test and a written test.
'Hmmm, these past three years I have been a robot,' he thought as he recalled the past three years; he had barely spoken to anyone and only spoke to answer questions; what was weirder was that everyone ignored the 'blank' boy as he lived his life.
'Must have been the system,' he mused to himself.
'System, what are you exactly?' Zasu said in his mind knowing from the information he received was the way to contact the system.
[hello, Zasu, welcome to the multiversal shop system! I'm a shop that can sell you anything within the multiverse! Be it skills, items, manuals, bloodlines, body modifications, or even people!]
' People!? Isn't that morally wrong?' Zasu wondered as he sucked in a cold breath.
[the system has access to the entire multiverse, the 'people' sold here are already 'dead' in their current world, so it doesn't affect their contemporary world in any way.]
'So I revive them to this world, huh.' Zasu wasn't very bothered by this. As the system described it, he would have to purchase the person to bring them to his world. If he felt disturbed by it, he'd just not buy anyone.
'System, how exactly does purchasing something work?' Zasu wondered since he did not see any 'status scree' around himself.
[the system shop is to expansive to list the products to the user, the user only has to tell the system the requirement for the product the user wishes to purchase, and the system will narrow it down for the user to decide what to purchase]
'What do I use to purchase the products?' Zasu asked.
[the system requires shop points or SP for short. The user can gain SP by killing people you view as enemies or taking system quest]
'That took a dark turn,' Zasu thought as he heard the system's reply.
[the system is the embodiment of the user, it grows and learns from the actions of the user]
'If I purchase a skill from another world that uses a different form of energy other than chakra. how does that integrate into my body?' Zasu wanted to know how his body might change through the system.
[the user's body does not use chakra, the user's body uses 'existence energy' or EE for short. It's the highest grade energy in existence; any skill or item in presence will be able to be used with this energy]
'Wait!' Zasu scream in his mind. 'What else has changed in my body?!' since his body used EE instead of chakra, he was worried something else was changed in his body and had adverse effects.
[the user's body has completely changed from its previous form!]