‣ Your twin brother, Yorichi, apologized for not being able to save his subordinates and asked if you wanted to be a demon slayer. You quickly agree.
◘Eighteen Years old, you have left your family and homeland and became a demon slayer.
‣ Eighteen years and three months old, Yorichi teaches you 'Sun Breathing' but you are unable to learn it due to your low talent, but you try to alter it to form your own breathing method, just as it was in the orginal.
‣ Eighteen years and five months old, you have successfully altered 'Sun Breathing' and now have created your own breathing method, which you call "Moon Breathing' and now have awakened your own demon slayer mark.
‣ Eighteen years and six months old, you challenge Yorichi to a swordsmanship battle. Yorichi aggress but under the condition that it won't be a death battle, you agree.
‣ The duel will be fought on the night of your nineteenth birthday.
◘Nineteen years old, the night of battle has arrived. You arrive at the battle ground in time, but then you realize that demon slayers have surrounded the area to watch the battle.
‣ The demon slayers were all impressed by your and Yorichi's strength.But in the end, you lost.
‣ Yorichi comforts you, but only you know that you have not shown your full strength.
◘Twenty Years old, You realize that a demon slayer with a demon slayer mark won't live past the mark of 25 years old, and the only way for you to live past the age is by becoming a demon.
‣ Twenty years and two months old, you fought with upper rank 6 and easily defeated him and your battle witnessed by the demon king Muzan himself.
◘Twenty Three Years old, your health is getting worse due to the Demon Slayer Mark, while your brother is still healthy and is killing demons and teaching other demon slayers his breathing methods.
◘Twenty Four Years old, Muzan Kibutsuji offers you to be a demon. At first you act as if you don't want to be one, but after a week you agree.
‣ Twenty Four Years old, you became a demon after injecting yourself with Muzan's blood and renamed yourself Kokushibo.
‣ Muzan asks you to go and kill the head of the demon slayers of that era. You agree and killed the the head, but left his child alive as to be the next head, and brought his head to Muzan.
‣ Muzan is satisfied with your attitude and makes you the new Upper Rank 1 demon, but you are not arrogant as even a Genin of the Ninja World can easily defeat you.
◘Twenty Five Years old, while you were researching your demon bloodline, your master Muzan was almost killed by your twin brother Yorichi and barely escaped from him.
‣ Twenty Five years and two months old, Muzan called all the Upper and Lower rank demons for a meeting. The meeting was about ways to eliminate sun breathing.
‣ You gave Muzan the suggestion to leak about you becoming a demon and spread rumors that Yorichi also supported you to kill the head of demon slayers.
‣ Muzan is amazed by your suggestions and even rewards you with more of his blood.
‣ Your brother was banished from Demon Slayer Crops as per your plan, and you, Muzan, and other upper-rank demons are working together to eliminate all sun-breathing users from Demon Slayer Crops.
◘ Twenty Seven Years old, You use the knowledge you gained from Blue Star to create a large amount of scientific equipment to aid in your research.
◘Twenty Nine Years old, You and other demons have successfully eliminated all the sun breathing users and you have started to research your demon abilities and blood lines.
◘Thirty Years old, Researching your demon abilities and blood lines.
◘Forty Years old, Researching your demon abilities and blood lines.
◘Fifty Years old, Researching your demon abilities and blood lines.
◘Sixty Years old, Researching your demon abilities and blood lines.
◘Seventy Years old, Researching your demon abilities and blood lines.
◘Eighty Years old, Muzan suggests you have a last fight with your brother, but you refuse and continue with your research.
◘Hundred Years old, Researching your demon abilities and blood lines.
◘Hundred and Twenty Years old, Researching your demon abilities and blood lines.
◘Hundred and Fifty Years old, Researching your demon abilities and blood lines.
◘Two hundred Years old, Researching your demon abilities and blood lines.
◘Two hundred and ten years old, you have cracked the reason for demons' immortality. From your research, you found out a new type of blood cell was the reason for demons' immortality, and both demons and demon slayers got their superhuman power from this same type of blood cell, which you named G-cells.
‣ While demon slayers used breathing methods to activate and grow the G-cells in their bodies, while demons devoured other human beings to increase the number of G-cells in their bodies.
‣ And you also guessed that the reason you were able to become a strong demon so quickly was also due to you using both the breathing techniques and devouring humans.
‣ And after researching your brother's dead body that was frozen in ice by you, you are sure about your G-cell theory as the number of G-cells in your brother is the highest you have ever seen.
◘Two hundred and Fifty years old, You try to perfect your bloodline while also fulfilling missions given to you by Muzan, but secretly you are also researching the ways to free yourself from Muzan's controls.
◘Three hundred Years old, you go to your brother's late wife's grave and spot the Blue Spider Lilies growing on her grave. You pick one up and devour it, but it did not give you any immunity to sun light, so you take the rest and start researching them.
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◘Three hundred and twenty years old, From your thousands of experiments, you have found the reasons for Muzan's demonification and also found the way to make your bloodline the perfect demon bloodline and free yourself from the control of Muzan.
◘Three hundred and twenty two years old, With your experiments, you have made your bloodline the most perfect demon bloodline, and the purity of your bloodline is even higher than that of Demon King Muzan himself, and you are now free from his control.
◘Three hundred and twenty two years old, You realized that even though you have perfect demon bloodline, you are still susceptible to sunlight.
◘Three hundred and twenty four years old, researching ways to be immune from sunlight.
◘Three hundred and twenty five years old, Muzan called a new demon meeting where he gave you the order to finish a mission, but you refused. Because of your behavior, Muzan became increasingly dissatisfied with you and decided to punish you. You pretended to be hurt but gave Muzan a surprise attack. Muzan was shocked that you can hurt him and quickly commanded other Upper rank demons to cooperate and kill you.
‣ But you who have the perfect demon bloodline, had long surpassed Muzan and upper-rank demons in strength, and in the end, you slaughtered all the demons and captured Muzan for experiments.
◘Three hundred and twenty seven years old, after some experiments, you realized the difference between Muzan and other demons was just that of a single organ. The bloodline you had, which you called the Perfect Demon Bloodline, was perfect at the beginning, but after many years of assimilation with normal G-cells produced by your body, it had degraded in quality, and after a few hundred years it might even return to the quality of a normal demon bloodline.
‣ But, with the help of this new organ, you can make your bloodline perfect forever, but when you experimented with it, you realized you couldn't transplant it from Muzan's body to yours due to genetic differences.
◘Three hundred and thirty years old, you have found a way to form this new organ in your body, but the only problem was that it required a huge number of G-cells, at least ten times the amount you have.
◘Three hundred and thirty one years old, you go on a killing spree, killing any demon with a huge number of G-cells.
◘Three hundred and thirty two years old, you have massacuted 90% of the demons, and the rest of the demons are hiding in forests or in rural areas.
‣ But for you, this amount of G-cell is not enough, so you switch your target from demons to demon slayer.
◘Three hundred and thirty three years old, cause of not finding enough demon slayers in the wild, you decided to break into the head quarters of demon slayer crops, but you don't act rashly and patiently wait and make plans to hone your strength.
◘Three hundred and thirty three years old, The time had arrived. It was a silent night. All the Hashira were called back for a demon slayer meeting. You realized it was your chance. When the Hashira were having their meeting, you quietly started to slaughter all the demon slayers in that area. But to your surprise, one of the demon slayers was able to notify the Hashira just before you slaughtered almost all the demon slayers.
‣ You are surrounded by nine strong Hashira. Feeling the huge number of G-cells in their bodies, you trembled and became excited but quickly became cautious.
‣ But to your dismay, all the Hashira of this era were weak and you slaughtered all of them and devoured them all and also destroyed the demon slayer crops.
‣ You feel the huge number of G-cells in your body and are happy as this amount is just enough to form the new organ that you have started to call the G-cell organ.
‣ You go into retreat in a huge forest inside a small cave and start forming your own G-cell organ.
‣ After 20 days of pain and exhaustion, you were finally able to form your own G-cell organ.
‣ You started to examine your abilities and the results were quite satisfactory as you are now able to have your perfect demon bloodline forever and you have also increased your strength.
‣ But in the end, you were still not immune to sunlight. You realized perhaps nezuko was the only way you would be able to be immune to sunlight?
◘Three hundred and thirty four years old, you don't want to wait for the birth of nezuko and now and have started to research chakra again.
◘Three hundred and Forty years old, Researching Chakra.
◘Three hundred and Fifty years old, Researching Chakra.
◘Three hundred and Sixty years old, Researching Chakra.
◘Three hundred and Seventy years old, Researching Chakra.
◘Three hundred and Eighty years old, Researching Chakra.
◘Three hundred and Ninety years old, Researching Chakra.
◘Four hundred years old, You finally found a way to store chakra in your body, and that was by using your G-cell organ.
‣ By fusing the blood energy that you use to make your own blood demon art and mind energy, you were able to form chakra. Though this chakra could not be considered an orthodoxical chakra but you still researched it more and called this new chakra " Blood Chakra "
‣ Though many ninjutsu could be used through blood chakra, the power was not the same and it took a long time for you to even learn the simplest ninjustu you had taken from the Uchiha clan when you escaped from Konoha.
‣ You don't give up and have started to learn the ninjustsu you have.
◘Four hundred and ten years old, Practicing ninjustsu and searching for ways to overcome sunlight.
◘Four hundred and twenty years old, Practicing ninjustsu and searching for ways to overcome sunlight.
◘Four hundred and fifty years old, Practicing ninjustsu and searching for ways to overcome sunlight.
◘Four hundred and sixty years old, Practicing ninjustsu and searching for ways to overcome sunlight.
◘Four hundred and seventy years old, you think nezuko is probably born already and have started to search for her.
◘Four hundred and seventy three years old, searching for nezuko.
◘Four hundred and seventy four years old, searching for nezuko.
◘Four hundred and seventy five years old, you finally found nezuko and quietly kidnapped her and took her to your hideout, and turned her into a demon.
◘Four hundred and seventy six years old, you are training nezuko and experimenting with her body.
◘Four hundred and seventy seven years old, you are training nezuko and experimenting with her body.
◘Four hundred and eighty years old, Nezuko was finally immune to sunlight. Just as you were about to devour her, she betrayed you, but to her despair, you were just too strong and devoured her.
◘Four hundred and eighty years old, You finally have became immune to sunlight, and now you have finally achieved your goal of becoming a perfect demon.
◘Four hundred and eighty one years old, you now have a new goal, that is---to control the world.
◘Four hundred and eighty three years old,, and you have control over all of Japan's higher level officers and scientists, and you have begun researching both chakra and demon bloodline.
◘Five hundred years old, you now control the entire world, and the entire world's resources and power are going toward the direction you want. But you do not feel happy at all. You feel as if something malign and dangerous is staring at you and you feel as if your demise is coming soon.
◘Five hundred and five years old, you feel more and more discomfort, but on the bright side, your strength has probably reached the top ranks of Genin and you think you might even reach the strength of Chunin.
◘Six hundred years old, You feel more threatened and uncomfortable and feel something staring at you. After you made a famous fortune teller divine your future, he divined that you have probably angred "Kami". You realized these malicious gazes on you might be from the "Will Of The World" or "Heavenly Dao". After all, demons like you should have been dead long ago.
◘Six hundred and ten years old, the scientists under you have finally researched one of the greatest weapons of mass destruction made by humanity--the Nuclear Bomb.
◘Six hundred and twenty years old, the scientist invited you to witness the first atomic bomb test, but you were hesitant and disagreed, and you did not go to see the bomb up close.
‣ Then the day arrived, and all the news channels were showing the bomb's launch; perhaps because you weren't going to watch the Atomic Bomb up close, the malicious gaze around you was at least ten times heavier; you felt joyous, and sat on your throne, watching the bomb go up on TV.
‣ But to your misfortune, the bomb that was planned to launch at least 5000 kilometers away from you started to deviate direction and fly towards your palace.
‣ The last words you heard were " Shit! The calculations had gone wrong. The location set was changed and somehow was set to the location of the king's palace" and then a huge blast happened and you felt that all your skin was melting and burning because of the heat, and after what felt like an eternity to you, you finally died.