I Swallowed the Bug Overmind's Egg

In the underground arenas of a wasteland metropolis, F-rank youth Ryker takes part in brutal illegal fights to pay for a cure for his terminally ill sister, Lena. In a desperate gamble he swallows a strange King Insect egg, which awakens a frightening power and launches him up the ranks at breakneck speed. The price is his own humanity, and as he digs into a hidden Imperial scheme tied to his family's tragedy, he must keep a grip on what remains of himself while the city is overrun by war and a swarm of insects.