In a world where Marvel and DC universes merge, Xi Nian, a transferee, lives an ordinary life until he awakens his superpower, "Kin's Master." Upon contact with the opposite gender, he gains their abilities! His roommate, who occasionally transforms into a golden armored goddess, his girlfriend who flies around the city in a red cape, his childhood friend who dons a spider-woman suit, and a red-haired twin he saved who wields crimson magic—they're all extraordinary. Xi Nian wonders, "Wait, does that make Superman my brother-in-law?" This story is about his daily life saving the world with his unusual superpower, or rather, his girlfriend saving the world while he... deals with other things.