Kitaru Saikyou no Fukushu-sha

is a Japanese light novel series written by Aika, with illustrations by Yunagi. The series began publication on January 9, 2021 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Although not wealthy, he is a young man who lived a happy life with his family.

However, one day, suddenly, his sister was arrested for innocent charges, and his mother who stopped it was killed because it was an obstacle.

The place where my sister was taken away is Prison Zorbados.

An extraordinary prison city where criminals live freely and even murder is tolerated.

Vido, who vowed revenge and gained the strongest power, went into prison himself.

"I'll kill you. I'll kill you without any excuses, no sympathy or pity."

In order to save my sister and avenge her mother's death The curtain opens.