Tekketsu no Kaihei Reijou

is a Japanese light novel series written by Osada Shin, with illustrations by Sakana Wo. The series began publication on January 17, 2022 by ASCII Media Works under their Dengeki no Shin Bungei publishing imprint.

Synopsis
"Lady! From this time on, you will be downgraded to the lowest creature on this earth!" Alicia, the duke's daughter whose engagement was abandoned by William, the second prince of the Kingdom of Vikrant, is swearing. The lord of the voice was her servant Abel, to be exact, Major Kyle Davidson of the US Marine Corps who assimilated him! Before Alicia, desperate to break her engagement, faces her ruin, she trains recruits to turn her into a "fucking slaughter weapon." To defeat the political enemies in a row and bring peace and order to the nation! !!