Wherein Shin Ryujin, one of the most competent bodyguards in the country, receives an offer from the Hwang family to be their only daughter's bodyguard. The problem is, Hwang Yeji, the girl she's supposed to be guarding, doesn't think she's fit for the job. But Shin Ryujin doesn't back down from a challenge. "If you'll let me, I promise to protect you until I no longer can't." [ tw: death, profanity, and violence. ]