January 6th 2022, it snowed in Tokyo after 4 years without it. This is a story about a man and woman soon to be complete stranger, in a snowy night of Tokyo.
Kazama Naoki is a crack detective at the private investigation firm Nemesis in Yokohama. He has a brilliant mind like Sherlock Holmes and solves every difficult case. But the true detective is actually his talented assistant Mikami Anna. The two of them, who make quite an odd duo, are searching for Anna’s father Hajime. He is a scientist and went missing all of a sudden. Together with Kurita Kazuaki, the owner of Nemesis who is Hajime’s good friend, Anna and Kazama seek clues to his disappearance. As they take on one puzzling trick-ridden case after another, they seem to find a hint related to her father each time that brings about a new riddle. Then they learn that the key to solving the mystery of his disappearance is a 20-year-old incident that has been buried in darkness. What Anna does not yet realize is that both Kazama and Kurita are connected to this incident.
Yumeka (Kanon Nawata) whiles away her time making art in a studio left to her by her grandmother, though it appears she’s not attached to the art and may not find real value in it. She sleeps with men easily but seems empty of emotion in general. Even more in a shell is her university friend Tomoko (En Nakagami), a clean freak who cannot get involved with men. Yumeka suggests Tomoko have a tryst with their friend Takaya, but Tomoko is naturally less than interested. She does, however, take up Yumeka’s suggestion to take a job at a softcore porn movie theater and this sets of a chain of events the film follows. There she meets Kyoichi (Ryusuke Fujiwara), a young man who prostitutes himself. The thoroughly opposite Tomoko is intrigued.
Sota Nishino is a good-looking high-school student. He meets Mai, who is his friend Yukihiro Nanase's younger sister. She is also a high-school student and somewhat naïve. Sota Nishino mutters to Yukihiro Nanase, "Your sister is cute." Mai overhears Sota's remark through the thin wall between her room and her brother's.
Nakagami En is a Japanese actress.