Superpower attributes: ordinary system, natural system, elemental system (metal, wood, water, fire, earth, electricity), space system
Grades (weakest to strongest): E, D, C, B, A, S, SS, SSS and SSS+
When everyone reaches adulthood at the age of 18, they will have a summoned beast of their own. The summoned beast has the same abilities and attributes as themselves, and the level will not differ much.
Level cannot be changed
Experience: After each battle, you will get random experience based on your battle performance. The experience can be used to improve your own strength. In other words, the more experience you have, the stronger your ability will be.
Purpose: Evil will not prevail against good, and never look down on anyone.