Ross gave up his position, Bump was no longer nine years old, Kelly gave up her heart, Bump was no longer a troublemaker, Schleswig gave up the team, Bump was no longer a big cat, the knight lost his heart, Bump was no longer hot and cold, Kaka gave up his sweetness, Bump was no longer an angel, Dad lost his mind and Bump was no longer a liar.

Convex and concave world (English: Convex and concave world) is a domestic original 3D animation produced by Kai Chuang Society, with a total of three seasons.

Animation tells the story that people in the concave-convex world constantly exercise and use their abilities to break through customs in order to change their destiny and realize their wishes.

The creator of the concave-convex world is a wayward god. He created countless planets and people in the concave-convex world and ruled them at will. At the same time, he also set up seven ambassadors and asked them to act according to God's will. However, the creator did not completely deny his people a chance-as long as he won the final victory in the "bumpy contest", he could get everything and give you the power to rule the world on behalf of God like the "Seven Angels".

However, all this is just the appearance of hypocrisy. There is no winner in this game. Until, our protagonist, Kim, appeared on the field.