That Time My School Was Invaded by Dimensional Snakes and Now I'm Bound to a Multiverse Protector!

After surviving a horrifying attack on their school by giant dimensional snakes, Ren and a small group of classmates struggle to adjust to a world that changed overnight. What first seemed like a deadly disaster slowly unravels into something far larger and stranger as hidden truths about the creatures begin to emerge. As mysterious new enemies appear and cosmic forces collide with ordinary life, Ren becomes tied to a powerful and unpredictable protector who reveals that the school incident was only the beginning. The survivors learn that their actions during the attack may have triggered consequences far beyond Earth itself.