My Bear of a Relative Wrecked My New House, Then Called Me Immature

This book takes place across multiple dimensions and planes, so it's no surprise that some chapters involve national destiny, rules, or the apocalypse. Be advised in advance that there is no romance. After his attempt to borrow a house for a wedding banquet failed, someone resorted to underhanded tactics. When Mu Nan returned home from out of town, he found his front door forced open. Sure enough, it was his unreasonable relative. He wanted to call the police, but his father stepped forward and agreed to settle things, then even threw him out of the house.

Just then, he unexpectedly awakened a System. The seeds of revenge quietly took root in Mu Nan's heart.