--- Earth , Japan ----
3 years later
At the age of 10 months old Jin was able to speak his first word( even he knew how to ) which overjoyed of his parents. And Hajime at 12 months old also has started to speak his first word with a same reaction of their parents.
Shuu Nagumo was an Owner of Game Developer Company which is also an otaku also a inspiration to build his own company.
Sumire Nagumo was an Shoujo Manga Artist which is also an otaku, due to their hobby they got close together until they get married together as the result of giving birth of the twins.
At the age of 2 Jin was able to walk on his own even a bit stiff was able to surprise his both parents. And Hajime at the age of 2 years and 4 months was able to walk like Jin it also a bring of surprise of their parents.
This year at the age of three, Jin was wake up as he found himself at the Dark space and in front of his was a Gigantic Red Dragon who was looking down of because of height difference.
" Hmm my new partner was too young eh, how can you able to awake me?" The Red Dragon said to Jin who was looking at him without feeling nervous.
" Me? My name is Jin Nagumo formerly known as Jin Kurogane when you say how can I awaken you? I just use a bit of Mana." He said as it's nothing a big deal.
"Judging from this world there is not a bit of Mana anywhere how can you get the Mana?"
Red Dragon asked again as he was curious at the kid in front of him.
" Because of Devil Gene I took a bit of mana , if more mana that I took I will lose my control to my Devil" he said this continue to look around him then he look again at the Red Dragon.
" Interesting then you need to training to be able to use me in the battle"
" Are you not curious why are you in this world?" Jin asked the Red Dragon.
" I know where I am because Goddess Celestia has informed me before I integrate in your soul" the Red Dragon said as it's nothing.
" You can call me Ddraig The Dragon of Domination I will make sure that we going to strongest in any world" Draig said proudly as he going to make pact to Jin as latter he nodded his head.
" Yeah I will make sure that I am the strongest Weilder of Boosted Gear among the predecessors of mine" Jin said with a grin on his face.
--
Jin wake up in the morning to was like a daily routine to him. The method to gain mana to activate the Boosted Gear was to draw out a small amount of Mana from his Devil Gene and to integrate on his own just like an Cultivator in wuxia novels. At first he try to draw out the at least 1/16 of mana from his Devil Gene, the impact to him was too great like he was stab by a knife and his devil was trying to control his body, a goat like horns was slowly come out of each side of his head and a dark crystal was come out on each hand and his back there was a dark spot which is the wings will come out.
Fortunately his will power was absurd enough to overcome the devil which is reverted back to his human form. He learned his lesson that he at least small amount like 1% if mana to draw out to integrate in his body.
He repeat this routine at least 1 month because of his small body, but the mana today that he was 3% from his devil. His strength could par to 7 years old even with a body of 3 years old. With a power of mana could try the Muscle Compression Technique
which he took from many martial arts and assassin genre novels and manga. This technique was use by assassin which it could change his/her physical body like a certain Middle-aged man able to change his body into a little girl body. But his technique was modified by him that he could compress his strength from his muscles in to inner strength with this he could prevent his body for turning into a body builder.
" Well at the age of 5 we will go into school, these two years left I need to integrate the mana to my body at least 20%, the more I could integrate the more I could conquer the devil."
After three hours of integration of Mana he walk down to the living room and wait for the breakfast. He saw his father in the dinning room was holding a folder which contains many sketch of character for the game, while his mother was preparing for breakfast as she saw Jin walked down from his room.
" Jin-chan I almost finished to make you should wake up Hajime-chan" she said as she prepare 4 plates.
" Yes Mom" he said as he climb up to wake up Hajime. His room was same as Hajime so he could not go far to find him.
" Haji wake up it is breakfast now" he said aloud to wake up Hajime which is covered in large blanket.
" Nmmm.. later" Hajime said as he lazily roll on his bed,but the blanket was thrown aside as he saw a comics filled of super heroes with Spandex. A thick veins pop out in his forehead as evil smile showed in his face. his hands was wriggling as he started to tickle Hajime with all his might.
" Yosh get ready for attack." he said as he tickle the side of Hajime.
" Uwawawa Onii-chan stop it hahaha I will wake up." Hajime said as a sudden jolt in his side as he started get up.
" Jaez we were 3 years old but you got influence by dad already" Jin said as he walked out in the room as he come in the Dinning room.
That right after they started to walk their parents was showing their collection of many animes or Super hero comics, due to their parents hobby both of them was influence ( but Jin in his previous live was a bit otaku ), their room field of many comics to manga that appreciate to their age.
" Jin-chan, Hajime-chan wake up now? Come here it this while still hot." his mother said. Sumire was requested to put a Hiatus of her work to take care her twins if the kids grown enough she could continue her work.
" Jin-kun what genre of game that you like? you can request anything and you both will be the first one will play." his father said to Jin who was starting to eat his breakfast.
" Fighting game with story." he said without hesitation as he remember the fighting game Tekken which is top game among the fighting games and story wise.
" Ohh okay would you like to look in this character?" he said as he pass the folder but it was interrupted by his wife.
" Food first later that okay" she said with smile but not really smile.
" Ohh okay" he said calmly but he was sweating profusely as he put down the folder in the table and starting to eat. A few seconds later Hajime come down to the dinning room as he started to eat. The looks of Jin & Hajime same face same built of body but the difference that was Jin has a long hair reach in his shoulder while Hajime was a short hair, Jin insisted to not cut his hair to could tell whoever the two.
"""" Thanks for the food""""
They finished their breakfast, Shuu was showing the illustration of character for the game to the twins, as Jin was giving a request to illustrate the character for the fighting game that their father suggested after that, Shuu was left to the Game Developer Company to work as the twin was a different hobby as do Jin was trying to integrate more mana to his body while Hajime was watching Mecha anime.
---2 years later----
The Monday morning the twins was wake up to their first day of school. Jin was successfully integrated the 20% of Mana to his body as his physical strength could compare to the tiger. During this 2 years the fighting game that they suggested was completed as the twins was the first one to play the game after 2 months the game was successfull as many customer was bought which is called T.K.S.(Tekken,King of Fighter, Stream Fighter) the game was like Marvel vs. Capcom that famous in many game console.
Sumire was returned to her work which is Hiatus for 4 years. At the Gate of the school Jin & Hajime was come out in the cars while their parents was saying good luck and have a friend at their age. They had attracted the attention of many people to the twins most likely to Jin Because of his long hair that reach in his back which tied by a ponytail as his sharp eyes was radiating a maturity ( if it combined his previous age of 17 and the current age which is 5 his mentality age was mature)
" Now then School back huh.." Jin says quietly that they could not hear his words.