My Sister Is Critically Ill, and You Want Me to Save Another World First?

【No System, no mindless plot, no suppressing power levels】 With his younger sister critically ill, Li Ke is summoned to another world along with the money for her medical treatment. The people of this other world want him to become a hero and save their world. But Li Ke only wants to go home. They tell Li Ke to broaden his horizons, mock his sister as a burden, and even try to kill him so they can summon someone else. Li Ke: Do you think I’ll put up with that? In his fury, he devours the energy of the Origin Core and immediately becomes the strongest in the other world! A hero? No way! Save the world? Not happening! All Li Ke wants is to go home and save his sister!