Adaptation

Marcus woke up in an unfamiliar wooden house. Quite average, at least, based on how the inside looks. The first thing he noticed was a piercing headache, and a sharp pain in the chest, in the position of his heart. Before the memories hit him, he even thought he was where he killed Rhodes.

Turns out that he transmigrated into the body of this orphan kid who recently found out the reason for his parents' death - Kyuubi's attack. He then went up to bully Naruto after getting the information from his friends and stabbed himself in the heart. He fell backwards and his head was also stabbed by a sharp metal. Coincidence?

"Argh! It hurts! Damn! Did I transmigrate into the Shinobi World?! Heck! I just killed someone, so is this some kind of punishment?

*Sigh* At least I've watched Naruto and some Boruto. That should be my advantage. I must use it to the fullest in order to survive!"

He quickly coped with his situation. Although it was a bit unbelievable, who asked novelists to be so imaginative? Marcus liked reading a lot and sometimes watched anime. He had obviously read some bizarre isekai novels, but he never knew it was a real thing!

'That bastard! I finally had my revenge. Although I'm sad that he was that extreme, I guess there was really nothing I could have done about it. But still, he ruined my life, thanks to the corruptness of the authorities. I need to make sure something like this doesn't happen again!'

With that, Marcus stood up. From the memories, this boy was called Raiden Soseki. He was only about four years old, with quite handsome looks. Black and white hair, black eyes and smooth skin of a kid.

He lived with his parents' friend named Husei Nanaka and only recently found out about his parents' death. Husei took care of him since he was a baby. He was about three months old when his parents died from the Kyuubi's attack. His father, Gojin Soseki, was a Jonin, but in the face of Kyuubi, he was just another annoying fly waiting to be swatted.

At the moment, Marcus... Or rather, Raiden's clothes were bloodied now. He cleaned the blood in the room, changed his clothes and disposed off the rag. Husei was at work. She sold dango and made quite enough profit from Konoha's sweet tooths.

It was currently Konoha year 51, four years after Kyuubi's rampage. Raijin decided to check his own body first.

He first checked the physical fitness of the body, and it was quite good. Next, mental or spiritual strength by focusing the mind in a state of meditation. He found out that it was easy to enter a meditative state and check his own body. He guessed it must be very good, and directly attributed it to the fact that he was a transmigrant. Next, he checked the chakra. It seemed to have awakened quite recently, when he transmigrated. There was a slight warm feeling in his stomach, but it was outright ignored due to the headache and heartache.

As for the chakra quantity, he didn't have anyone to compare with yet, but if he had to guess, he would say above average because chakra was known to be a combination of physical and spiritual energies, and his spiritual and physical fitness were also very good. He also felt quite 'full' of the chakra. Well, he would start ninja school in two years and would find everything out slowly.

Summarizing everything up, he was fit to be a good ninja in the future. Definitely above average with enough hardwork.

'Since it's come to this, I need to train in physical fitness since my spiritual fitness surpasses it by quite a big margin to achieve some sort of balance. Maybe something special will happen then?'

With this thought in mind, Mar- sorry, Raiden decided to start training. He began running laps around the house, which covered about 15 square meters. After running about ten laps, he started doing push ups, and then squats, then pull ups... Basically every exercise he knew. With his 17 year old mind, he trained to target simultaneous development of most muscles, making sure to not stop until he really could do no more. After about an hour, his four year old body really couldn't hold on anymore, sweating buckets. He rested for 15 minutes and drank some water and continued training with breaks until the evening.

After work, Husei came back home and met Raiden. She noticed that there was something different about him, but she couldn't quite point it out. This 25-year-old woman didn't think too much about it and greeted Raiden, heading straight off to the kitchen to prepare dinner.

"Raiden, you have been very quiet lately. You know, your father wanted you to be a great ninja, and your mother wanted you to live a fulfilling life, have a family and be happy. Both of them want the best for you, so stop being so gloomy all day. They will be sad to know you're sad, right? So cheer up, okay?" Husei said, worried that this kid might get too depressed over time. Ever since he accidentally overhead the news of his parents' death - three days ago, Raiden had been quiet and detached, not playing with his friends anymore and not saying more than ten words per day. It was truly saddening to see such a sharp change in a 4 year old's personality up front.

"Don't worry, Husei - obaa san. I'm fine. I've decided to be a great ninja, so that I can protect you and my future cherished ones, so that I won't die while doing so. I have unlocked my chakra today and have started my training. Please help me with the resources my father left behind!" Raiden said, bowing his head to Husei at the end.

Teary eyed, Husei replied, "Raiden... I'll help you to the best of my ability!" She clearly hadn't expected such touching words from a little kid.

"Thank you very much! I'll go to bed, and train early tomorrow!" With that, Raiden went to bed, glad that his father secured some resources for his training. He was looking forward to the true beginning of his training tomorrow!