The Dark Doctor Ikuru

After a catastrophe causes diseases to reproduce, the world faces a spreading medical crisis. Doctor Ikuru suffers from an illness that makes him immortal, and his unconventional medical methods earn him scorn. Tasked with saving a dying world, Ikuru sets out on a mission to find a way to die. His search for an end to his suffering takes him to the limits of humanity as he works to save the world he hopes to leave behind.