When the murder of Tsukasa's parents leaves her and her brothers homeless, she finds herself turning to the same people responsible for the deaths of her parents - the yakuza and fellow classmate/Yakuzi head, Ryuji. From their very first meeting, Tsukasa finds herself in debt to Ryuji, and the only way to pay it off is to become his bodyguard. Yet, the incurring debt seems to greatly increase, regardless of how much Tsukasa works. Perhaps Ryuji has other reasons for keeping her by his side?
Plain when she's a girl, but disguised as a guy, she's got a good body, is awesome at fighting and has a handsome face.
Despite thinking that Ida is a guy, Kang Naru falls in love with her.
Now everyone thinks that Naru is gay, Ida wants to tell him the truth.
"What should I do? If they know I'm a girl - "
- But at what cost...?