Earth alone.

His narcissism finally caught up to him.

He had treated everyone horribly, and lost his friends. I mean, they did care, but..

Earth really thought they hated him.

I mean, why wouldn't they? He'd treated them horribly. He manipulated Venus, treated Luna horribly, and was rude to Mars.. He remembered what they said before they each left.

"My water might kill Earthlings if they drink it, and Venus might have heavy metal pools on his surface, but we're both not NEARLY as toxic as you!!"

What Mars said before leaving with Venus.

Honestly - Earth agreed. Be understood, but a bit too late.

Now, he was alone, with hallucinations of Mars, Venus and Luna, which eventually dissapeared but.. The damage had already been done. He felt guilty, sad, and was blaming himself. He was already in pain all the time from the earthlings on his surface, he though everyone hated him, and just wanted to..

Die.

Just to fly into the Sun. He thought everyone would be better off without him. So he started to exit his orbit, going at a steady pace towards the Sun.

What he didn't know, was that Luna and Mercury were looking for him - they were in his orbit. Bit too late, but---

Wait.

They saw Earth from a distance. Heading.. Towards the Sun.

And so the chase started.