Junchang Chaoyang, a high school student who accidentally entered another world, planned to use his rich knowledge of games and the knowledge of the other world to live a happy life in the new world. However, his ability was too weak. In front of him, who did not have any cheating ability, appeared Junchang Maye, a super brother-loving sister who had obtained the strongest cheating ability in the other world. Chaoyang used his sister's overprotection of him as a weapon and started a new life in the other world.