Shirayuki and Zen Wistalia have finally affirmed their romantic emotions for each other, and life has returned to normal. Shirayuki continues to work as an apprentice court herbalist at Clarines' royal castle, and Zen continues to work alongside his assistants. When Crown Prince Izana, Zen's older brother, receives an invitation from Raji Shenazard, the prince of Tanbarun, their daily routines are interrupted. The herbalist is summoned to Tanbarun for seven days in order to forge a new friendship with the formerly self-centered and arrogant ruler who had forced Shirayuki to become his concubine. Shirayuki is certain to get into problems again along the road, as she is pursued by a mystery boy named Kazuki, whom she has never met.