I'm a Terrible Student, but I Can Beat Up Black and White Impermanence. Makes Sense, Right?

【System + Comedy + Farming + Irreverent + No Female Lead】 After transmigrating into the body of a failing student, he is discovered by the will of the world and cursed with an inversion: the harder he works, the weaker he gets. He has no choice but to lie low at the Yellow Springs General Store and enjoy life as a laid-back shopkeeper. By day, he opens the front door and serves the living; by night, he opens the back door and does business with the dead. Black Impermanence: “They only changed their nationality. What gives you the right to stop them from reincarnating?” White Impermanence: “Those reincarnation identities are priced so high, aren't you ruining the Underworld's reputation?” 【Black and White Impermanence hold a grudge against you: Looks +520, Charm +521, Confidence +1314, Defense +9527】