A third-year junior high school female student accidentally time travels back in time the day before her high school entrance exam. In order to go back through time, she can only get a kiss from the male protagonist. The heroine happened to be granted a marriage by the emperor, but the hero wanted to cure his own heart disease and get the blood of his beloved, so he used the heroine to develop a relationship with him, and then used it for his own benefit. The story is about the male and female protagonists each having their own hidden agendas, and the snipe and the clam fighting each other.
Concept: Love is not limited by space and has no boundaries