Relatives gather from afar in wintery Ashibetsu upon the death of patriarch Mitsuo. A mysterious woman named Nobuko suddenly shows up. Her appearance gradually exposes wartime secrets and Mitsuo's unknown past.

Hoping to find a sense of connection to her late mother, Gorgeous takes a trip to the countryside to visit her aunt at their ancestral house. She invites her six friends, Prof, Melody, Mac, Fantasy, Kung Fu, and Sweet, to join her. The girls soon discover that there is more to the old house than meets the eye.

After his parent's divorce, Kazuo Saito moves with his mother from Onomichi and must leave his girlfriend behind. At his new school, Kazuo is surprised to reunite with his childhood friend Kazumi.

Four sisters with no consanguinity are living together since childhood. When facing misfortune and grievances in lives, they give support and encouragement to each other, even sacrifice oneself to help others.

Four people are discovered brutally murdered in an up-scale high-rise apartment. All the victims appear to be family, but as the investigation deepens it is discovered that one of the victims isn't related to the family.