The two heroines fall in love and kill each other through time travel! From close friends to life-and-death enemies, one wants to dominate the world, and the other wants to return to the original world.
The first girl falls in love with the second boy, the second boy falls in love with the second girl, and the second girl likes the third boy and the fourth boy. But the fifth boy likes the second boy and wants to kill the first girl, and the fourth boy likes the first girl and sacrifices his life to save the first girl. Then.........
