I Am the Digital Emperor in National Beast Control

During the invasion of aliens, the human race boss mastered the method of controlling beasts at a critical moment, allowing everyone to control beasts. The human race is also in crisis and can take a breather. On the territory of the human race, a baby with a soul from another world was born and lived peacefully for 18 years. Until a round creature called Rolling Ball Beast was summoned during the coming-of-age ceremony. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.