At the boundary between symphony and emptiness

So it is your average story. An Otaku gets reincarnated after dying into one of his "Meh, it's alright" anime series. Fortunately due to dying, his mind came into contact with root of all things and his origin awakened after it was submerged in the true nothingness of " ". We behold as our protagonist takes on one of the most bullshit journey you have ever seen in this world filled with songs, and thus it will be a spectacle for the ages.

"Everything in existence has a flaw. Humans, Noise, Relics, phonic gain, alchemy, Outer physics and even Divine power. It's natural to have an end if it has a beginning. My eyes can see the end of all things. Get lost, priestress. No matter how long or great a life is, as long as it exists, I won't hesitate to kill even a god!"

(Disclaimer: Apart from the storyline and OC i do not own anything else)