Su Yanyan won the lottery. "Congratulations! You have won the right to own a System!" Su Yanyan: "I wanted money but... okay." A lottery is a lottery, after all. System: "Congratulations! You have won the perk to owning a world-hopping System! Your main goal in every world is to defeat the villainess!" Su Yanyan: "Oh, one of those trendy novels and stuff. Ok, so what role do I play as?" System: "The Villainess!" Su Yanyan: "..." ???