In the region of Soul of peace, on a full moon night there was a cry in the trashcan near the dark castle, the family of Yuki heard the cries. Akari Yuki a fine women with yellow hair approached the trashcan from where the cries were being heard from, she slowly peaked into the trashcan, the shade of moon light fell on a 3 months baby, with dark coloured hair and light brown eyes. Akari was shocked and at the same time felt bad for the child, she took him in her hands and called her husband, Kenji Yuki. A muscular man with B+ blood group, regardless his looks, he is a kind man.
He looked at the baby and asked Akari "Where did you find that baby?". Akari looked at the baby and replied "In the trashcan". Kenji was shocked and disgusted by how the parents of the child abandoned him, he said "Why give birth to the baby if they can't raise it." he said being sympathetic to the child. Akari being very kind hearted she asked Kenji "lets adopt him", Kenji looked at the child and said "Are you sure our children will treat him right?". Akari was unsure for a while but then replied "of course they will treat him right, why did you have a doubt about that". Kenji still unsure of this and then looks at the baby and sighs "look we-" before he could complete, Akari speaks in between looking at the baby "your name is Taguchi yuki" she says smiling, Kenji sighs and says "looks like your already dead set for adopting him", Akari smiles at the baby brightly. Kenji sighs and says "look we have two children there, you think they will even accept this?"
Akari looks at Kenji puzzled, she says "uhh, why will they be angry, we brought them a new brother right" she smiles. Kenji sighs "it's not that simple Aka-", Akari intervenes "they will be alright, don't worry about it". Kenji was still unconvinced and had doubts about the relationship between the kids.
After a while of walking, they finally come back to their house in the dark castle, Akari still carrying Taguchi, her happiness was evident. Kenji beside her still unsure of how the things might turn out. A kid comes running to them shouting, "Mom!!"
The boy, around 4'3" tall with spiky red hair and bright green eyes, stopped in his tracks when he saw the baby in Akari's arms. Akari asked him "what happened isamu", Isamu smiled, "nothing mom, who is that". Kenji looked at Isamu and said to himself "his smile seems odd". Isamu tilted his head and asked Akari "mom, where did you find this garbage, he smells like one too", Akari smacked his head "don't be rude, he's your brother now, and ummm he did come from the trash can". Isamu said "brother? But I already have a big brother" his smile was bright but his eyes said something else. Akari sighs "Isamu, he is your younger brother, we are a family no-", a voice comes from the stairs "his an outsider not our blood". Kenji and Akari both looked at the stairs, Akio comes down the stairs saying "let me tell you mom, we are the soul users, god knows what this trash is. Don't mix this thing with us!", Akari said stunned "how could you call him "trash", and what if he's not our blood, I will still consi-". Akio shouts "that shit is not your son!! And he will never b-", Kenji slapped Akio across the face " mind your tongue Akio, that's your mother". Akio kept his hand on his cheek "so now I get slapped for an outcast." Akari intervenes "no yo-" Akio talked in between "enough." Akio turns and walks upstairs. Isamu says "dad you shouldn't have slapped him like that." Kenji sighs and says "he deserved that, anyways welcome your new brother Isamu"
Isamu says "why did you have to slap big bro for an outsider" Kenji looks at him and says "the baby is an outsider but now is our family, you both have to accept it, don't be selfish isamu". Isamu looks into kenji's eyes "I am ok with it but you could've given big bro some time to settle with that outsider…. But you just slapped him without even thinking about it!" After saying this isamu walks upstairs too.
After 5 years, Taguchi was in the library helping his mother to clean the room up, while doing so, he found a book and says intrigued about the book "umm blo-blood fucker?" Akari laughed her, "honey that's not blood fucker, that blood flow" Taguchi smiled innocently "what is this mom" Akari says running her fingers through his hair "that book gives information about soul clan." Before Taguchi asked more questions, Kenji said from downstairs "Akari come down with Uchi, we need to go for the blood test" Taguchi looked at them confused "what's blood test", Akari looked at him and smiled "nothing honey, it's just a normal test, you will get to know about it when you go to school". Kenji looked at her, and said "what do you think he will get? I just wish his blood is belonged to the soul clan." Taguchi is still confused about the whole conversation which is going on but decides to stay quiet. After a few minutes of discussion, Akari and Kenji decided to take him for the test, in just a few minutes they were out of the house. Akari kneeled infront of Taguchi and fixed his collar and also said "listen honey, don't be scared there ok?" Taguchi nodded his head. As they approached the center of Kansai, the main city in Soul of peace. They arrived to the united blood inspector building, the car was parked in the standard parking zone for mid level blood groups. As they entered the building, there is a very high level security in there, the assistant there guided them to the checking room, a huge machine was in there to check the blood's contents. Taguchi was called forward and told him to keep his hand in the small hole in the machine, a few sharp pins where penetrated into his hand taking his blood, just after a few seconds, the computer screen showed that his blood group is SO+ but his capability for any ingot was "null".