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

[No system, no brainlessness, no pressure to fight] His sister was critically ill, but Li Kelian was summoned to another world with the medical expenses. People from another world want him to become a hero and save the other world. But Li Ke just wanted to go home. The people from the other world persuaded Li Ke to open up the situation, and also mocked that his sister was a burden and wanted to kill him and summon him again. Li Ke: Do you think I can bear it? Devouring the source core energy in anger, he directly reached the top of the world and became the strongest! Brave? Improper! Salvation? Won't! All Li Ke wants is to go home and save his sister!