At Seiyou Girls’, an all-girls boarding school, there are rumors of an angel.
Our story takes place at the end of the second term, just before Christmas.
Hina, Rin, and Fumi: three girls that became roommates in the spring, when they started school.
The three all come from different backgrounds and have completely different personalities, but they share one strange similarity.
They all saw an angel when they were young.
And they all gradually begin to suspect that one of their roommates might be such an angel...