Hikari Fujiwara grew up in a medical hospital in a remote small town. He lost his mother at an early age and was raised by his father, Fujiwara Sawei, who was a doctor. When he was young, he was talented and talented and was selected as a scholar. After his father died when he was nine years old, he stopped studying and stayed in a medical hospital as a boy. However, due to his active nature, he could not work well. He spends his days doing nothing, wandering the streets, and the one thing he hopes to do most is to become a heroic hero. When he was seventeen, he met Fujiwara by chance, who disguised himself as a woman to escape forced marriage. He accidentally discovered the shocking secret left by his father Fujiwara Sawei. In order to find out Sawei's past, he and Fuji started a difficult journey.