This is a brain teaser.
Any similarity is purely accidental.
This is God's paradise lost.
"Containers" and players are residents here.
Players come from the outside world. If they want to leave the park, they must clear seven "container" game levels.
Gaia was the only player to pass six games, and he invited Kureha to play the seventh level with him.
Number Seven appears, he is the "container" of the seventh level.
Then... The game begins.
Note: This is a short fungus, it cannot be any shorter_(:зゝ∠)_