1 Prologue

In a destroyed temple surrounded by dead lands, was large group of at least 100 people wearing varying sets of armor/outfits. All of these people are circled around the downed form of an injured man with expressions of grief on their faces.

This man possesses longish black hair and blue eyes that were quickly becoming lifeless. He's wearing some sort of white uniform that was currently dyed crimson with his blood, a gaping hole present in his chest.

The young man opened his mouth to try and say something, but instead vomited up a mouthful of blood.

"Haru-Kun!"

A young woman screamed out to him as she held onto him, tears falling from her sapphire eyes. She has long blonde hair flowing down her backside with bangs framing a beautiful face that is similar to a few of others in the crowd of people. Her white battle dress is getting stained red with the man's blood as she holds him, but she pays no attention to that.

Fujimaru Haru could barely see those around him, all of them nothing more then mere blurs at this point. Regardless, a small smile formed on his face as he stared at the blur that was holding onto him.

"...I...love you, Jeanne..."

Thus Haru died in his wife's embrace, surrounded by his servants...his family.

|0|

In a traditional Japanese room with tatami mats on the floor lied a very old man, his long hair is completely white, his face wrinkled, and his body frail. He's wearing an orange kimono with black hakama, a red haori is draped over the top of his sheets with a sheathed katana not too far away. He has on a pair of hanafuda earrings as well, pictures of rising suns on each of them.

However, there was two things that stood out about this old man. One is that on the right side of his face was red flame like marking that could be mistaken as a tattoo. Second was that his eyes appeared to be completely white, even his iris's lacked any color. In other words, he was completely blind.

This man is none other then Tsugikuni Haru, the second Sun pillar of the Demon Slayer Corps and the slayer of the progenitor of Demons, Kibutsuji Muzan. He is the last of the demon slayer corps, with him all breathing techniques will be gone.

All of the other pillars have already succumbed to their demon slayer marks, though a few were able to keep living, they eventually became too ill and passed at around their 60's.

Haru, now in his early hundreds, is on his own death bed. Unfortunately he has no one left, he has out lived his generation and due to his constant travels, he never formed any true bonds.

However, he has zero regrets. After he had killed Muzan, the remaining demons had fled Japan in an attempt to escape death. Haru had travelled the world in pursuit of these demons, taking it upon himself to make sure that no more Muzan's ever appeared again.

As he traveled, he saw many things. He was there when humanity first made it to the moon, he was there when World War I and II happened, he was there when the first computer was made. He saw the good side of humans, he saw the bad side of humans. However, no matter what he saw, he would always believe that humanity has unlimited potential.

Actually...he does have one regret. It's that he never was able to find someone he loved, never able to have a family and live peacefully with them...

With this last and only regret, Tsugikuni Haru took his last breath...completely alone.

0

I had died...again. I am sure of that fact, I died of old age and due to the fact that I also had the demon slayer mark that was supposed to take my life away at an early age.

However, I didn't expect to wake up again...with the memories of my last life either!

Though it is nice that I have a reason as to why I have that cross that appeared after my villages massacre. I'll have to thank my wife if I see her again.

But why am I an infant!?

Did I really get reincarnated again? I know that the Lord exists, so why do I keep getting reincarnated? Is there some other mission that I must do?

Also, I seem to have some new power as well. My vision is filled with with odd red cracks. If I recall correctly, these are 'lines of death' correct? I know that Ryogi has explained it to me when I was curious about her mystic eyes before. Though I certainly never expected to acquire them.

Also, I still can't seem to control them properly. This is mildly irritating, it had taken me a long time to figure out how to shut off 'See Through World' and now I have some other ocular power I have to learn to turn off.

This one is even worse as I am not the only one that feels uncomfortable, the people around me tremble in fear whenever I look at them with these eyes. I'm forced to shut them every time anyone comes near, it's not that bad but it is sort of annoying.

As for where I am...it appears that I am in some sort of orphanage. The caretaker is a kind woman that looks like she is a former nun of some sort, something rare in Japan.

She had taken me in and seemed surprised by the Hanafuda earrings and cross that was with me, both items I am very grateful to still have. I may not worship the Hinokami like my mother and ancestors did, but those earrings were gifts from my mother, and the cross is the only thing I have left of my wife.

Regardless, I appear to be hungry, so I do what all babies do.

"WAAAHHHHHHH~!"

0

It took me a while, but I finally managed to turn my Mystic Eyes of Death Perception off. Though my eye color remained the same as if they were on, they lack the typical glow that accompanies with turning them on. To say that the caretaker of the orphanage was surprised at being able to see the color of my eyes is an understatement, she burst into tears and made a huge feast.

I guess seeing me with my eyes closed for three years put a bit of a strain on her.

As odd as it sounds, I do like having blue eyes again, even if they are slightly a different shade! Beings able to see again after so long is quite a blessing as well. Though I have confirmed that I still have my demon slayer mark and, oddly enough, I can now summon my old sword as well as the Gae Bolg replica that Scáthach gave me after I completed her training.

Another thing that I learned quite quickly was that this world seems to have a large amount of mana in the air. Not prana, but mana. Naturally this leads me to believe that this world is still in the Age of Gods despite being in the modern era.

I was treated to yet another surprise when I activated my circuits, it would seem that I have a rather potent mana core. Unfortunately I do believe that it's kind of wasted on me as I don't know much mage craft other then the basics and some rune craft. In Chaldea, I mostly relied on mystic codes to cast any sort of spell...

Still, why did I get taken to another parallel world? Is there something I have to do?

In both of my lives, I was drawn into battles that decided the fate of many lives. Da Vinci and a few servants stated that I was considered an agent of Alaya. Not in the same way as the Counter Guardians, but as someone who is 'nudged' into taking a certain action that then lead me to being the last master of Chaldea.

In my case it was donating blood to what I thought was a blood drive, only for it to actually be Chaldea workers hiding and using searching for potential masters.

In my second life, I don't think that it was the Counter Force that lead me into the situation of becoming a demon slayer...

Regardless, all I can do now is prepare myself for the future.

I won't be caught off guard by whatever this world will throw at me, not a third time.