After shedding bitter tears to save a hopeless dark fantasy world, I destroyed everything, killed the Demon Lord, and then returned to the past. Now I'm trying to save the world with the system I received as a...

The harassment from my in-laws who look down on me as a commoner. My wife who ignores me with indifference. It's been 10 years since I ran away from them. Now, all that remains is a fallen household... And my...