Following the 1993 Okushiri earthquake, 10 year-old Hana Kusarino is orphaned from the disaster and resides in an emergency shelter.

Jungo's girlfriend Komachi feels emotionally neglected by him and observes that he is more affectionate towards his adopted daughter than her.

Hana reveals that she had already known about Jungo being her real father, willingly committing incest to help each other get over the loneliness of losing their loved ones.

Hana causes the ice Oshio is standing on to crack and drift away, and she coldly refuses to save him to keep her secret safe as he freezes to death.

Years later, Hana has become more independent after graduating from college, found a job as a receptionist, and discontinued having sex with her father.

As Jungo converses with Daisuke, Hana seductively caresses her father's leg and they stare into each other's eyes.