Shinigami no Rehearsal

Shinigami no Rehearsal summary: Taichi Kurobe, a high school boy with absolutely no confidence in himself, has lost the will to live. One day, while he's on the rooftop, a shinigami appears before him The shinigami offers him a deal: in exchange for receiving his soul on graduation day, Taichi will be granted the power to rehearse an entire day once. During the short time remaining until graduation, Taichi decides to use this power to walk a different path in life than the one he’s known.