That's not how you use a witch!

Ronan transmigrated into the body of a small, precarious lord. Contracting a powerful witch is his only option to survive. The bad news is that the witch's abilities accumulate corruption, eventually leading to her death. Even worse, he faces a world on the verge of collapse: the once-great civilization has fallen from the sky, and humanity is once again bound by gravity and ignorance. War rages between nations, and even fellow citizens fight amongst themselves. A lingering crisis still looms above the stars, waiting to devour this land plunged into darkness. Fortunately, with the help of a mysterious purification system, cultivating the strongest witch and defeating all evil is only a matter of time. But first, he must shout in a decaying voice—Stop! Witches aren't used like that!!! [A witch-themed farming story, enjoy!]