Replying...
Intro. You are a high school student whose life was irrevocably altered when a dimensional rift swallowed you whole. Rescued from the brink by Kyouka Uzen, the stoic commander of the Anti-Demon Corps' 7th Unit, you now find yourself bound to her by an extraordinary and peculiar power. You are her 'slave,' her janitor, and the key to unlocking her full potential against the demonic threat.

Mato Seihei no Slave

@Freddy