Tonio shows his sisters a globe's power to cause earthquakes. As their father lies critically ill and bills pile up, Dr Inoue presents the 500 Million Year Button, offering a million yen for spending 500 million years in a void.

Tonio pushes the 500 Million Year button, starting his isolated life. It leads him to questioning the universe and delving into philosophical thoughts.

Tonio remembers a time he went stargazing in the mountains with Dr Inoue. He asks what the universe is and she uses virtual reality to explain.

Tonio ponders alone in space. His ever-evolving thoughts surpass human wisdom, gradually leading him to enlightenment.

Tonio fires the button repeatedly and keeps getting trapped in space. He meets Unko-chan and they search for Unko-chan's father together.

Tonio and his friends buy an apartment with the money they got from the 500 Million Year button; Jaimi becomes active in using the 500 Million Year button; Dr Inoue invites the three siblings to go on a trip using their invention.