Insect Calamity: I Command an Endless Swarm

Brody Smith is abandoned by his family but awakens a rare ability, becoming an SSS-rank Insect Beastmaster. Still, everyone believes he is useless. With his engagement canceled and his inheritance stolen, all he has left is a weak praying mantis. But after activating a mysterious system, he gains control of an endless insect army that multiplies by the minute. To the disbelief and horror of the Smiths, Brody can now single-handedly turn the world upside down.