The Motomiya family is said to be one of the most distinguised families in the area. The 17th head of the family, Motomiya Kinue, although a woman, she's also the president of the Motomiya family's parent company,

Yuki is your one year junior childhood friend, and at the same time your lover. On a Christmas day, you and she come to a rural snow lodge for snowboarding. Here you and she are set to challenge an 'Escape Room'