Falling for the Villain in Otome game

"I love you, truly and deeply... please become my wife," I said with trepidation, kneeling before the embodiment of evil, who held the female protagonist tightly in his grasp. The next moment, I found myself standing in a wedding hall, donning a pristine white suit, as I faced the villain himself, exchanging vows. "Now, I pronounce you husband and... husband. You have the right to... end your husband's life." This was supposed to be a conventional otome game, where I was meant to save the main character by sacrificing myself. Yet, unexpectedly, I was now bound in marriage to the antagonist. "When did this turn into a BL romance?" I couldn't help but ask, bewildered. Please note that I didn't create the cover image, and credit goes to the original artist.