Hina, who became a royal mage to fulfill a promise she made to her childhood friend Evan, is banished from the royal court because of her commoner background. What happened to the five years she risked her life to protect her country without even finding Evan? In front of the heartbroken Hina, Evan appears for the first time in 10 years. To her surprise, Evan is the prince of a neighboring country! Hina has been assigned to Evan's service, but once again there is the "status" barrier. In order to overcome the "unreasonableness" of their surroundings, the two set out to exterminate dangerous demons in the snowy mountains.... Hiina and Evan, the genius mage duo, will beat the world's unreasonableness!