This strikingly beautiful person... Could it be my beloved fluffy wolf?! Mariana, the plain and unassuming older sister, and Maureen, the glamorous and popular younger sister, are identical twins. Kind-hearted Mariana always ends up with the short end of the stick, yet she lives earnestly. One day, during the kingdom's "Saintess Selection Test", Maureen is chosen as the kingdom's honorable Saintess. However, repulsed by the Saintess's true duty—to offer her virginity to the king—Maureen forces Mariana to take her place. In her moment of need, the one who supported the devastated Mariana was a mysterious silver-white wolf... but there's a catch...!