I Beat Up My Mother-in-Law from the Start and Activated the Break-Their-Defense System

Beneath the calm facade of a bustling metropolis, undercurrents churn. This is a high-martial world, where technology and martial arts are deeply integrated. Warriors can often be seen soaring between skyscrapers with their lightness skills, and dazzling martial techniques occasionally streak across the night sky.

Yet a massive danger lurks beneath the city: mysterious underground dungeon instances. Like unknown realms of darkness, these dungeons open without warning.

This novel and its characters are entirely fictional. Any resemblance to actual persons or events is purely coincidental. Do not imitate.