Am I the Most Important Chess Piece in Traveling to Another World?

An ordinary female college student suddenly and inexplicably traveled to a different world on an ordinary afternoon while preparing for the postgraduate entrance examination. Okay, come on, watch me show off my skills. Why are all NPCs so handsome? Is this a normal different world? What do you mean, it's all up to me next, why are you looking at me? I'm pretty, but don't keep looking at me. Why do you want to assassinate me again? What does it mean that when you assassinate you, you will also take me with you? Don't put the flag! Why did I travel through time? What is your relationship with him?