The first week's little Akashi came to play with the second week's little Heizi by signing a contract with God, but he ended up playing to death.
Do you think this is the end? No, no, no, the ending is that Tsumu-chan Akashi and all Tsumu-chan's little Kurokos will always be happy together. Don't ask why, all of this was done by Akashi, the scheming boy, and has nothing to do with the author.