The Ruthless Man Is in Another World

It is a diary that records the life of a hard-core ruthless person from another world, and I am its writer and its user. I relied on the power I gained from dreams, hoping to protect this dream-like family. I am not the savior of the world. I am just the son of my parents and the younger brother of my elder brothers and sisters. Other identities are useless and have nothing to do with me. It's a big dream, but I would rather sleep forever.