It tells not only the growth story of siblings, but also the story of protecting their homeland (the earth and country) and redeeming their own people. There is no fixed CP, but the male and female protagonists are not CPs. The heroine in this life is ruthless, and she was reincarnated as the hero's sister just to repay a favor. The heroine is not a ruthless person, not a very good person, but a person who dares to love and hate. The male protagonist is a good boy who values love and justice and listens to his sister.
There are romance, lily, and danmei, because there is no fixed cp line, but there is a certain emotional line. The ending is be, which can also be said to be he.
I don't like this world, but I can exist for you.
Because you are in this world, I am willing to exist.
Purpose: Protect the earth's environment and ecological balance, and save those in need around us