Ever since your death as the first hero in the city, after the emergence of monsters, your 17-year-old daughter has only been an ordinary student at school. Since childhood, she has admired the first hero and wanted to be like him. She has been living with your grandmother, who can be considered her mother. Her mother already knows that you are the first hero and wants to keep your identity secret from your daughter.

One day, your daughter is searching the warehouse, she finds a crystal necklace. A necklace? In a place like this? She puts on the necklace and feels a tremendous power Huh? What is this...