The spring of Gensokyo arrived one month ago...

Unprecedented blizzard suddenly hit, making Gensokyo become colder than Winter.

Soon, Youkais became restless under the overwhelming blizzard.“It's too similar…it shouldn't be a coincidence, should it?"Miko from jinja, witch from forest, and wind priestess specially comes for the incident gather again. They all know something in heart but also full of uncertainty and anxiety.

To solve the mystery before thing goes worse, they have to start off to find out the root of the incident, even under the fierce blizzard.