Working as an Undercover Agent in Vongola's Case Where Everyone Went Black

I traveled through time to a world ten years later where everyone was black, and became an undercover agent hiding in the Vongola family. There is nothing wrong with the people in this world, including but not limited to the ruthless Smiling Tiger Godfather 270, the terrifying and terrifying right-hand man 590, and the unblinking "natural shark hand" of the shark man 800... In order to make them all change back to their original appearance, I began to work hard to find the cause of all this. As a result, I discovered something horrifying. ——I am surrounded by Riddler :) *CP270, HE *Non-declassified works Intention: Let everything go back to the way it was before. You will still be the warmest teenagers in my memory.