[Book Transmigration] Protagonist, Please Spare Me

Every cultivation fantasy has a protagonist who suffers cold shoulders and disdain early on because of his poor aptitude. In short, his life is an endless tale of bitter hardship and tears. But every protagonist has an unexpected encounter that either changes his aptitude or grants him a Heaven-grade technique, letting him cultivate like a genius even with trash-tier talent. And our protagonist won't turn evil because of all the hardships he suffered early on. Instead, he remains upright, just, kind, and cheerful. By contrast, every novel has its obligatory antagonist. He must have excellent aptitude, a noble background, and a handsome face. In short, he's rich, good-looking, and popular with everyone. But the moment the protagonist appears, the antagonist loses all his shine. Everyone starts fawning over the protagonist, even the person the antagonist has a crush on falls into the protagonist's arms. So the antagonist does everything he can to oppose the protagonist, with the obvious result: the other guy is the protagonist, after all, and has the protagonist's halo shining over his head. Naturally, the antagonist becomes the protagonist's experience points, then completes his mission and makes a glorious exit. Now Bai Moyan has transmigrated into just such an antagonist. To avoid becoming the protagonist's experience points, Bai Moyan decides to cling tightly to the protagonist and support him without wavering. But after the protagonist has his way with him, Bai Moyan is horrified to discover that the protagonist is reborn. He's long since stopped being the upright, just, kind, cheerful protagonist he once was. He's a completely, irredeemably corrupted boss. Theme: