Bleach: Guarding Seireitei and Driving Yhwach Mad

He transmigrated into the world of Bleach, only to become the unit of measurement for how weak a Soul Reaper could be: Kensei Muguruma!

It was now just before the Thousand-Year Blood War.

The Wandenreich was about to invade the Soul Society, and a great battle was imminent.

As someone with the combat strength of a weakling, how could he possibly stand up to the Sternritter?

Luckily, the strongest Tower Defense System activated. As long as he defended the Seireitei, he would receive rewards!

You have defended the Seireitei for one day. Reward: Forbidden Kido!

You have defended the Seireitei for ten days. Reward: Eight Gates!

You have defended the Seireitei for one month. Reward: Hogyoku!

You have defended the Seireitei for one year. Reward: Soul King's Power!

Years later, gazing at the Seireitei that remained unconquered despite his repeated assaults,

Yhwach's mind finally broke!

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