Death and Illness for Love

He experienced an epidemic that destroyed the city, and almost everyone in his family died. Only he and his sister survived, but his sister was seriously ill. He, his sister, and a pair of siblings who also survived by chance depended on each other. In order to treat his sister's illness, he was still young but ran countless times. In the middle, because of his impatience, he signed a contract with a mysterious organization called "Save His Sister" but in fact it was to sell his sister. In the end, he watched his sister pass away after the last operation. Since then, he has been sinking, blaming all his faults on himself, leaving the pair of siblings who depended on him, and began to go crazy and sink into numbness. Until... This time, he met a girl who was exactly the same as his sister and also suffered from a terminal illness. But this time, he won't make the same mistake again. Mysterious concerts, genomes sold on the black market, what is the "panacea"? From the trivial matters of life to the top games, from ordinary mortals to genetic weapons, let madness and blood, order and chaos, simultaneously turn into this world-destroying feast! … "Even if I have to choose between her and the world, I will never give up on her. This world that makes me so painful and sick, even if it is destroyed, what does it matter?" … In the darkness, who is taking the right path? (Just keep this book)