Leran is the new law of the world. Because she is the new law, she was thrown into the parallel world by the old law to experience human life as soon as she became conscious.
The first life: The heroine was thrown into a warm small family in modern times, where she felt a deep affection and love.
Second Life: The heroine is still in modern times, but it is a world that is approaching the end of the world. There, the female subject experienced the pure friendship between partners, and also felt the cruelty, selfishness, and adaptability and survival ability of human beings.
The third life: The heroine was thrown into ancient times
The fourth life. . . .