Travel to a World Where Colors Are Used to Attack Others

The male protagonist discovered that the blood he shed would not change color, and then he thought he was going to heaven. However, he was told that he was selected to become a color messenger. O_o Houli shit, all kinds of wonderful adventures happened in the new world. It turned out that I was not the color messenger who was accidentally selected, and everything was for someone's purpose. . . This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.