A baby was born in the Umayashiki family during the Heian period.
This baby boy had no temperature at all since he was born.
He is dead.
It was not until the cremation ceremony that he was given a chance to survive.
So this baby came into this world with a terminally ill body.
The doctor asserted that the child would not live past the age of twenty.
The child who has been bedridden knows that he may not live beyond the next twenty years.
He likes quietness and the sun. The warm feeling allows him to sleep well on the grass for an entire afternoon.
Although the price he paid after that was that he became seriously ill and bedridden due to evil wind entering his body.
He longed for life outside, but did not fall into resentment towards the world because of his serious illness.
The Ubuyashiki family was large, and occasionally children would pass by his window.
He would get some things he wanted to know, or even things he didn't know at all, from the children's mouths.
Then I watched them hop away like the little rabbits described in the books.
He slept there, staring at the scene outside the window, his heart still warm.
On days like this, spring goes and autumn comes, summer turns to winter, and time flies by rapidly.
A kind doctor appeared and developed a medicine to prolong his life.
He was happy because just twenty years could not satisfy anyone.
What an irresistible temptation this is for a child who has been bedridden for a long time.
Why do you have to act like you're on good terms with everyone?
He was just one step away from death, so why could he put on such a smile!
"This isn't me!"
Death, this is what he fears most.
He feared that he could only live for twenty years.
But here, he chose to give up becoming a ghost.
In these limited twenty years, he became a person who kept moving forward, believed in others, kept looking for hope, and faced death with a smile.
"Impossible! Impossible!! This is all fake!!!"
Muzan Kibutsuji experienced twenty years of a baby's life. When he saw him die in the sun with a smile on his face and no regrets about his life, the Demon King let out a sharp roar.
He couldn't believe this, that this man who was as bright as the sun as Tanjiro could be a possibility for him.
This kind of life where you gain nothing and lose everything is actually chosen by "yourself"!
The sense of tearing between twenty years and a thousand years made him feel absurd and bizarre. He could not understand this kind of life, but he experienced those twenty years in an almost first-person perspective.
The mind was deviated, and the choices were completely different from what had happened. A thousand years of time and twenty years of time collided with each other, and for a moment they were entangled together, making it impossible to distinguish between reality and illusion.
Perhaps there is a trace of conception about the past in the corner of Muzan Kibutsuji's heart, which is why this illusion appeared.
Unlike Muzan Kibutsuji who has experienced twenty years of life here, in the world outside the illusion, everyone is looking at each other in confusion.
"More than twenty minutes have passed, and Muzan Kibutsuji is still standing here motionless."
From a distance, Mitsuri Kanroji poked Muzan Kibutsuji, who was standing there motionless, with the Nichirin Sword in her hand. The Millennium Demon King had been standing there for twenty or thirty minutes and had not moved at all.