The Ex-machina is a gift from Gods whereby mankind can protect themselves. However, mankind use its power to fight against Gods, greedy humans were not satisfied. Instead, they fight against Gods continuously and the world was destroyed at once.

According to tradition, witches are supposed to be wed to demons as wives; the more magical power contained by the witches, the higher they are sought after by the demon races for prestige, power, bloodline, and fame. 16 year-old Sunya Velladonna decided to break this forced marriage herself, forced onto her by the demon world, and decided to escape to the human realm - only to end up as a runaway bride. While in the human realm, she encountered a recently divorced young doctor, Othder Hurvenss. In order not to be caught and sent back to demon realm, Sunya took the opportunity to make a magic marriage contract with Dr. Othder while he was sleeping. One of them is an escapee from a forced marriage, while the other is one who fell out of love, a disillusioned doctor. With both of them facing marital difficulties and having coincidentally met each other, what will happen to this pair and will occur?