Kyoukai Senjou no Horizon – Kimitoasamade - Volume 4B, Chapter 11: Wolf in the Reverberation

With the revival of spiritual energy and the breakdown of the order of species, it is a difficult test whether human beings can still stand at the top of the biological chain.

(There is already an old book, The Strongest Descends in the City, you can read it.)

- Description from novelbuddy

Government intelligence agencies realized that Konrad, the world’s number one wife robber, was endowed with a supreme weapon allowing him to turn the purest of maidens into hungry beasts: The Golden Rod!

He adores her to the very core, sparing nothing, even risking his own life, all to provide a lifelong sanctuary for her and the child. She loves him as if he were life itself, desiring nothing more than to live and die together, never to be parted. With four lively and adorable children, a spirited mother, and a charming father, their story unfolds into a joyful and sentimental tale of happiness!