He was the most outstanding knight in the church, with great strength and absolute loyalty. He could perfectly execute every task. Until one day, he killed a succubus… He did not expect that this succubus not only did not die but, in some way, parasitized onto his own body… His body assimilated with this succubus, transforming into her likeness… After that, his stomach would often grow hungry, even with the strongest will of a knight, he could not resist this hunger…

Whenever this happened, the voice of the succubus would echo in her mind: 【My dear knight, you have become a mature succubus~ go obediently hunt~】 "Grr… You can forget about it! I would rather die!" 【You really are not obedient, well, there's nothing I can do about it~】

Despite the knight's desperate resistance, she still could not resist the succubus within her controlling the body to do things against her faith.