Colorful begins at a train station of death, where an impure soul is unexpectedly given a second chance at life against his will. Reincarnated into the body of Makoto Kobayashi, a 14-year-old boy who has recently committed suicide, the soul is given a cruel assignment: within six months, it must identify the boy's greatest sin and prove it has earned the right to move forward.
Forced to live as Makoto, the soul initially resists the idea of continuing life in his place, but everyday experiences slowly reveal how complicated people's emotions and actions can be. As Colorful follows that uneasy adjustment, it uncovers the fractured families, private shame, and hidden pain that shape the world around him. What begins as a punishment gradually becomes a lesson in empathy, showing how ordinary moments can expose the weight people carry in silence.
Rather than offering easy answers, Colorful looks directly at suicide and the daily struggles human beings face but are too abashed to confront, turning a borrowed life into a meditation on regret, connection, and the fragile reasons to keep going.