It a began with a wizard that created four pearls. All four pearls were mythical and diffrent. The yellow pearl had a phoinex in it. The orange pearl had a dragon in it. The blue pearl had an ice dragon in it. And last but not least the White pearl had a ninetail in it. The white pearl was considered the strongest of them all and the weilder of the power needed to have good strength, speed, iq, talent, bravery and calmness. So Ania gave birth to four kids. The oldest was named Akito the midddle childs were named Juhwan and Bachuro the youngest was named Naoto. The father Shisu knew he could only give them the pearls if they had the requirements needed to wheild the power of the mythical animals because it had a great side effect if it was consumed without the requirements.
So when the brothers were teens they were trained enough to welid a mythical animal power in them. It was kind of easy to seal them inside. It's just to do the six hand signs to seal the animal. So Akito being the oldest had more than only the requierments even if the brothers never knew about what animals they were geeting as starters. Akito got the Ninetails. Bachuro got the phoenix, Naoto got the Ice dragon and Juhwan got the dragon. Akito then transformed into a human ninetails and reverted back after a couple of minutes. Bachuro got wings and the two others got orange and icy wings and horns.
Transforming into a half human half animal is rare only 0.1% of the world of Hiroshima has that type of power. Not soon after a man with the dark phoenix came to Hiroshima to kill the brothers father. And all of the brothers were training with eachother not knowing whats comming. And when Fidro arrived an evil villian he killed their mom and dad infront of them with Phoinex of the Soul. The brothers could not hold their anger other than Akito he was also sad but he told his brothers to hide and run while they can cause he is not a person to mess with. They refused and when they were about to fly Akito made them pass out with the help of Kurama the Nine Tails. Then he took them to a safe place outside of Hiroshima. Till that day Akito promised him self to take revenge on Fidro.