Inglis Eucus is a girl undergoing training as a knight. However, in her previous life she was actually a man who had made her name as the king of heroes. She was reincarnated into a beautiful girl and worked on honing her skills to become stronger.

She likes to fight all things strong. However, since she does not qualify as a knight, she decides to become the bodyguard of her childhood friend, Rafinha. The funny thing is,she treats and considers Rafinha like his grandaughter.