A year ago, Atobe Keigo's sister and the daughter of the Atobe family, Yume Atobe, was expelled from the Atobe family and also from the Hyokui due to violence. However, this smart girl disappeared on a cold rainy night.
In the early spring of the new year, when the late cherry blossoms were in full bloom, a girl as cold as water appeared in Rikkai, a college with a rigorous school spirit. The appearance of this girl named Rikka Yinyin also caused a ripple in the heart of the boy who was the Son of God.