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They were supposed to live an ordinary life like ordinary people. But when he was young, his father passed away and left behind a sentence that changed his life. They are the descendants of a cursed family. After reaching adulthood at the age of 18, their clan members will meet someone who needs to protect him (her) in their lives. They will do everything they can to silently take care of him (her) and protect him (her). Whenever they encounter something irreversible, they will use their abilities to turn back time. In contrast, they will also age accordingly. We call this kind of person - Space Guardian