Three kids staring at a button that trades 500 million years of nothing for money they need right now. The show understands that desperation doesn't philosophize, it just chooses. The animation is bare and the pacing stumbles after the halfway point, but what lands in those early episodes, the arithmetic of suffering, the way hope and horror look identical when you're broke, stays with you longer than shows that try twice as hard to matter.

Three siblings face a desperate choice when they cannot pay for their father's hospital treatment. A stranger arrives with an offer: press a button, receive a million yen instantly, and spend five hundred million years alone in absolute nothingness. When that span ends, your memory is wiped and you return to the moment you pressed it. To you, the money seems to appear in an instant. The money is real. The isolation is real. Only your awareness of it vanishes. The siblings are seventeen-year-old Suneko, fourteen-year-old Jaibi and five-year-old Tonio. The button waits. The premise seems clean, almost logical. But the anime asks harder questions: What does it mean to suffer if you'll never know you suffered? Does a choice still matter if the cost erases itself from memory? How far will desperation push you toward the unknowable?