It started as a rumor. A patch of grey on a shop sign. Then a whole building. Then a block. Now, Hazakura was a charcoal sketch of itself. People’s clothes, faces, even their eyes — drained into monotone. Only a few still remembered red.
It seems you're referring to (possibly a manga or light novel series), specifically looking for a story related to Chapter 50 . However, as of my current knowledge cutoff, there is no widely known or officially translated series by that exact title in mainstream manga databases. gaishuu isshoku ch 50
That said, if you’re open to a — I can craft a short original story inspired by the title’s possible meaning. It started as a rumor
Kaito raises the shard. The great grey eclipse trembles. Then a block
And for the first time in fifty chapters, a single drop of crimson falls from the sky.
Yuki looks at him. “I want to see the sun set again. Even if it hurts.”