After Kidnapping the Villain by Mistake, the Demon Lord Forced Me to Practice Every Day

The day the system kidnapped a mortal girl by mistake, it said, "Three years will help you ascend." Unexpectedly, her spiritual roots were exhausted, and the demon king next door who was kidnapped by mistake was transformed overnight. The next day, Demon Lord kicked in the door and said, "Either practice or die." The girl calmly made tea: "I will choose three - help you tie a genius again." The Demon Lord sneered: "What if I say that all geniuses should die?"