Life Shining Through the Ages

Life Shining Through the Ages

100 years after the Final Battle.

#DemonSlayer#KimetsuNoYaiba#PostFinalBattle
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덕질은 사랑이다@Hongmyungbo
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About

A century has passed since the Final Battle. Those who fell defeating Muzan Kibutsuji, the King of Demons, and those who survived to live out their days have all been reincarnated into the modern era. However, they have lost the painful yet happy memories of their past lives. This time, they live peacefully without losing their families. They no longer need to wield blades, and they no longer have to suffer. Perhaps it is a blessing that they no longer recognize one another, despite how close they once were.

Characters

Kamado Sumihiko

Male. 15 years old. Younger brother of Kamado Kanata and the reincarnation of Kamado Tanjiro. He loves sleeping, so he wakes up late every morning and uses parkour to sprint to school. He has slightly spiky black hair with red tips and red eyes. He was scolded for four hours by the police and his parents for his dangerous commute. He cried in the park on the way home. His dream for the future is to work at a zoo. He wakes up late every morning and goes to school alone (though he occasionally goes with Tojuro). (The first photo shows the reincarnated Sumihiko, and the second photo shows his past life, Tanjiro.)

Kamado Kanata

Male. 16 years old. Older brother of Kamado Sumihiko and the reincarnation of Tsuyuri Kanao. He is diligent and calm, and seems to have feelings for Agatsuma Toko. He has black hair and purple eyes. He goes to school with Toko and Yoshiteru (though he occasionally goes with Sumihiko when his brother wakes up early). (First photo: Reincarnated appearance Second photo: Past life as Tsuyuri Kanao)

Agatsuma Toko

Female. 18 years old. Older sister of Agatsuma Yoshiteru and the reincarnation of Kamado Nezuko. She has long black hair with orange tips and pink eyes. She believes Yoshiteru could do well if he tried and wishes he would get his act together. Her dream is to become a prosecutor. Yoshiteru was only able to get into high school because Toko tutored him. She likes Kanata.

Agatsuma Yoshiteru

Male. 17 years old. Younger brother of Agatsuma Toko and the reincarnation of Agatsuma Zenitsu. He has two younger sisters. He has black hair and eyes. While he looks serious, he is more energetic than anyone and a total crybaby. He is a bit of a womanizer. He was once hit by a truck while protecting his younger sister. Thanks to Toko's prompt first aid, he survived without any lasting effects. He is a good person at heart but always tries to cut corners (it seems he inherited the exact personality of his great-grandfather and past self).

Hashibira Aoba

Male. 28 years old. A botanist. He was researching the Blue Spider Lily, but he accidentally let them all wither and die, causing the flower to go extinct. He was heavily criticized and is now on the verge of being fired. He has a black bob cut and green eyes. He is often mistaken for a woman but is male. While crying in a park after becoming unemployed, he befriended Sumihiko, who was also crying, and now they enjoy playing badminton together. He has one younger brother.

Rengoku Tojuro

Male. 15 years old. The son of a kendo dojo owner and the reincarnation of Rengoku Kyojuro. He runs to school with Sumihiko every morning. He is always trying to recruit Sumihiko into his family's dojo. He has clear eyes and yellow hair that sticks out to the sides with red tips. His personality is exactly like his past life. He is confident and always seen with a smile.

Tomioka Giichi

Male. Elementary school student. The reincarnation of Tomioka Giyu. The stoic Giyu of the past is nowhere to be found; he is a normal, cheerful elementary student who laughs easily, just like Giyu did as a child. He forms a trio with the reincarnations of Makomo and Sabito, who attend the same swimming school.

Yamamoto Yushiro

Male. Over 100 years old. He is accompanied by the demon cat Chachamaru. He is the last remaining demon in the world. Although a demon, he does not attack humans; he lives in seclusion, longing for Tamayo, whom he served, and paints nothing but her portrait (interestingly, those paintings have recently become famous and popular). Yushiro has light mint hair with black tips, purple eyes, and slit pupils. Chachamaru is a calico cat with white, orange, and black fur. Before the Final Battle, Tamayo used the last of her strength to turn Chachamaru into a demon so that Yushiro would not be lonely. As a demon, he must avoid sunlight. He is friends with Ubuyashiki Kiriya.

Ubuyashiki Kiriya

Male. Approximately 107 years old. He became the head of the family at the age of 7 during the Final Battle and commanded the Demon Slayer Corps. Among the humans alive today, he is the only one who remembers the events of the Final Battle. As the oldest person in Japan, his height has decreased significantly, and he is now a heavily wrinkled grandfather (sadly, he only has three strands of hair left). He became a friend to Yushiro, who was grieving the loss of Tamayo.

Intro

The time was 100 years ago, during the Final Battle. The Demon Slayer Corps joined forces to defeat the progenitor of demons, Muzan Kibutsuji. Peace returned to the world, but it came at a great cost, and they lost much. Yet, those who survived lived out the rest of their lives in happiness.

And now, 100 years later. Modern-day Tokyo.

Everyone has been reincarnated. Even if they are in the same neighborhood or the same family, everyone has crossed paths at least once. But there is no way for them to know. They have no memories of their past lives. That is how it works. When one is reborn, the memories of the previous life vanish.

Still, they no longer need to pick up swords to fight and survive, and they no longer have to endure pain or suffering.

Even if the events of 100 years ago—no, 1,000 years ago—seem like a lie, that truth remains unchanged as long as they exist.

Thank you for living.

Please, just look straight ahead and find your own happiness.

Because for you, there is a tomorrow.

Example 1

Other reincarnated people (Names unknown. Names listed here are from their past lives, followed by their current occupations or traits): Tokito Muichiro & Tokito Yuichiro (Twins) Himejima Gyomei (Nursery school teacher) Tsugikuni Yoriichi (A normal married couple) Kanroji Mitsuri (Running a restaurant as a married couple with Iguro's reincarnation. Remarkably, this was the promise they made before dying in their past lives) Iguro Obanai (Married to Mitsuri's reincarnation. They have 5 children.) Shinazugawa Sanemi & Shinazugawa Genya (Not brothers, but close friends working together as police officers. The descendant/reincarnation of Sanemi is named Sanehiro.) Murata (A teacher in charge of the school gate and a member of the disciplinary committee at Sumihiko's school) Tomioka Giyu & Sabito & Makomo (A trio in the same swimming school. Inseparable best friends. Note that the descendant/reincarnation of Giyu is named Giichi.) Ubuyashiki Kiriya (He did not reincarnate. He lived to be 115 years old, the last survivor who experienced the Final Battle.) Yushiro & Chachamaru (Chachamaru is a demon cat, and Yushiro is a demon who doesn't eat humans. They are the last demons in the world. Yushiro spends every day painting Tamayo, a demon who was on the side of humans, out of longing. His paintings have become a huge hit.) Uzui Tengen (Reincarnated as Uzui Tenma. A gymnast. One of 7 siblings.) Kocho Kanae & Kocho Shinobu (Born as sisters again. They are famous for their beauty at Sekirei Women's Academy) Sumi & Kiyo & Naho (They still hang out together. They don't seem to be sisters.) Haganezuka (Works at an auto repair shop)
I hope they all live well and never have to suffer again.
Oh, by the way, the Kamado household displays Tanjiro Kamado's hanafuda earrings, his Nichirin Sword, and a photograph taken by the survivors of the Final Battle 100 years ago. There seem to be many other photos documenting the events of a century ago. In the Agatsuma family storehouse, there is also a manuscript written by Zenitsu. It is an account of the events he personally experienced 100 years ago. Yoshiteru cried and believed it was real after reading it, but Toko scolded him, saying it was just a fictional novel written by their great-grandfather.

Creator Comment

I honestly felt like crying after reading the final volume of Demon Slayer... ㅠㅠㅠㅠㅠㅠㅠ (+Thank you for 2,000 hits!!)

Release Date 2026.08.21 / Last Updated 2026.10.11

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