Hametsu No Ganbou Daiisshou < ESSENTIAL >

The first crack appeared not in the sky, but in the mirror.

He stood before it, watching his own reflection splinter — not into fragments of glass, but into memories. Each shard held a failure: a word unsaid, a hand unclenched, a city he had watched burn from a safe distance. And yet, he smiled.

It seems you're referring to (破滅の願望 第一章), which translates roughly to “Desire for Ruin: Chapter One” — possibly a doujin music track, a game BGM, or a fan-made composition, given the stylistic naming. Hametsu no Ganbou Daiisshou

No answer came. Only the sound of his own heartbeat, syncing with the slow collapse of the floor beneath him.

He reached into the largest shard and pulled out a black flower — petals made of ash, roots made of regret. It bloomed in his palm, and with it bloomed the first note of a song that had no end. The first crack appeared not in the sky, but in the mirror

“Is this what you wanted?” the mirror whispered.

If ruin was the answer, then he would become the question. And yet, he smiled

This was not madness. This was purpose.