Evolution: From Parasite to God-Beast

He was reborn as a tiny flea and contracted to the school's most beautiful girl. While the world laughed at their "useless" bond, his evolution system was working in secret. By consuming essence, he evolved from a parasite into a moon-swallowing beast. He protected her through deadly trials and crushed every arrogant rival. Together, they will rise from the lowest ranks to challenge the supreme heavens, proving that size truly doesn't matter.