Fantasy: I Mistakenly Stepped on the Demon King's Skirt at the Beginning

Su Chen traveled through time and became a disciple of the devil. The adventure system is activated, but the first task is to step on someone's skirt? Hey, that little sister should be the new one, she is the only one. Step on it three times in a row. The mission is finally completed, but the reward is too generous, right? What? She turned out to be the most powerful and cruel Ice Heart Demon Lord in the legend? ! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.