Maki Maki (Takako Matsu), Suzume Sebuki (Hikari Mitsushima), Yutaka Iemori (Issei Takahashi) and Tsukasa Beppu (Ryuhei Matsuda) happen to all meet. They form a quartet and begin to live together in Karuizawa during the winter. There is a big hidden secret.
Maki Maki plays the lead violin in the quartet. She has family and only goes to Karuizawa on the weekends for performances. She has a negative personality and barely gives her opinions.
Suzume Sebuki plays the cello in the quartet. She is unemployed. Yutaka Iemori plays the viola in the quartet.
Tsukasa Beppu plays the second violin in the quartet. He comes from a musical family and also works at a donut company. He is the leader of the quartet and provides his grandfather's villa as a base for the quartet. Tsukasa Beppu has secrets.
Life for Tetsuo Morita (Sosuke Ikematsu) is not going well and he blows off his anger on gambling, but he keeps losing. At the racetrack, he meets tycoon broker Ginji Hirai. His nickname is Gin-san (Silver) . Tetsuo Morita admires his bad side and his ability to attain huge amounts of money. Tetsuo wants to surpass Ginji and be called Kim-san (Gold). Tetsuo takes a step into the illegal world.
When Surgeon Kazuaki Okita (Takuya Kimura) was a rookie doctor, he was kicked out of the hospital due to his friend’s Masao Danjo (Tadanobu Asano) plan. He left for the U.S., leaving behind his girlfriend Mifuyu (Yuko Takeuchi). With his hard work, he became an excellent surgeon.
10 years later, he comes back to Japan by request of Mifuyu’s father, who is a hospital director. Mifuyu is now married to Masao Danjo.
Saenai (Shinichi Tsutsumi) is an ordinary salaryman, married to Enko (Kyoko Koizumi) and having a daughter and son. One day, he meets a mysterious old man who forces him to take a super suit with superhuman powers. Saenai is constrained to keep the peace. After he resolves trouble and takes off his super suit, his activities slip from the mind's of other people.
Kotoha Ninomiya (Manami Higa) works in the general affairs department at a confectionery company. Suddenly, she receives an order to transfer to the public relations department. She has a hard time there. Making things worse, Kotoha Ninomiya learns that Atsushi Imagawa (Dai Watanabe), whom she holds secret feelings for, is about to marry another woman. They have been friends since they were young. Heart broken, she attends Atsushi’s wedding ceremony. At the ceremony, she is moved by Kumi Kuon’s (Kyoko Hasegawa) congratulatory speech. Kotoha Ninomiya is a legendary speech writer.
56-year-old Kururi Takuzo (Yoshida Kotaro) is the third-generation owner of a traditional Japanese confectionery shop ‘Kururiya’ in Kototoibashi, Tokyo. He received a strict education from his father, who was a man with an old-fashioned way of thinking, and his skills in making the shop’s signature dango have surpassed his father’s. But in his personal life, he is thrice-divorced and cannot help himself when it comes to women. His hobby is to go for walks in town with the antique single-lens reflex camera that his father bought for him when he was a child, and capture the scenery of the good old-fashioned Tokyo which will change someday. One day, a young man visits ‘Kururiya’ while they are in the middle of preparations. His name is Takakura Masahiro (Fukushi Seiji) and he is the son of Takuzo and his first wife. The atmosphere between father and son is awkward due to the suddenness of this visit. It has been a while since they last met. Disregarding the presence of a shocked Sudo Akane, the shop’s part-time employee, Masahiro tells his father that he would like him to meet with the girl that he is going to marry soon. Several days later, Takuzo goes to the venue despite whining about it. Masahiro’s fiancee Ebihara Rumi (Suzuki Anne) is cheerful and sensible, and makes a very good impression. Even after they introduce themselves and make general conversation, Rumi’s aunt Fujiwara Minako (Kuroki Hitomi) does not show up. So they have no choice but to proceed with the meal as they wait for her. Just when they feel that they have reached their limit, she finally appears. In that moment, Takuzo inwardly notes that she has dispelled his notion of an aunt. However, as the meal progresses, a disquieting air starts to settle over the table. Minako flares up at what Takuzo talks about and a heated exchange ensues between the two of them. This develops into a quarrel even though this is their first meeting. It is the worst encounter. But fate will not let them go.
Mizuki Hayase (Haru) is 25 years old and her mother Akiko (Yuki Saito) is 50 years old. Mizuki Hayase teaches English at a girls’ high school. Aikiko is a devoted mother to Mizuki and Mizuki totally trusts her mother. In fact, the two are like best friends. Mizuki’s father Koji (Yasufumi Terawaki) is like an outsider in the relationship between mother and daughter.
Housemaker Matsushima (Yuya Yagira) begins working for the Hayase family. Matsushima gets close to the mother and daughter. While Mizuki spends time with Matsushima, she realizes that has been too dependent on her mother. Soon, Akiko feels like her daughter is getting more distant from her. Akiko, afraid of losing Mizuki, makes the dangerous decision to seduce Matsushima.
Shinichi Sakurai (Sadao Abe) is married to Kanako (Kyoko Fukada) and they have a daughter named Kaori (Mikuu Yamada). Both, Shinichi and Kanako received only a middle school level education. Even though they don't have much money, they are a happy family. At work though, Shinichi experiences effects of only having a middle school education.
One day, Shinichi sees Kaori’s poor score for a national test. He freaks out and decides to improve Kaori's education. Thus, 41-year-old Shinichi begins studying with Kaori and instructs her for the upcoming middle school entrance exam.
There is a small old-fashioned shop called ‘Fuji Family’ at the foot of Mt Fuji that is a convenience store in name only. It is run by three sisters who are known for their beauty. Dependable Oguni Takako (Yakushimaru Hiroko) is the eldest sister, free-spirited Nasumi (Koizumi Kyoko), the second sister, is the complete opposite of Takako in both personality and lifestyle, and tactful Tsukimi (Mimura) is the youngest sister. Although Nasumi lived and got married in Tokyo, she abruptly came back with her husband Kinoshita Hideo (Yoshioka Hidetaka), but died suddenly of illness eight years ago. Takako finally wed Haruta Masao (Takahashi Katsumi), with whom she has had an enduring but difficult relationship, this year. The newlyweds now live in an apartment nearby but Takako constantly comes to ‘Fuji Family’. Hideo had a shotgun marriage with Aiko (Naka Riisa) but he still lives with the Ogunis and runs the shop. A new part-timer Purio (Higashide Masahiro), whose actual name is Kuromatsu Heizo, has joined ‘Fuji Family’. And Nasumi appears as a ghost to grandaunt Shoko (Katagiri Hairi) who is the only one who can see her. One day towards the end of the year, Takako sees a magazine article about the famous soothsayer Kitty Toyama (YOU) and realises that she was her junior high school classmate. Kitty had made an outrageous prediction concerning Takako’s fate in her junior high school diary. With the addition of a new ghost Tesshin (Hada Keisuke) and Shoko’s friend Tokuzo (Kaga Takeshi), disturbance erupts in the lives of every member of the family.
Toyoko doesn't know how to love her daughter Terue and subjects the latter to physical abuse when she was a child. As a result, Terue was hungry for love but didn't know how to be loved. Years later, Terue grows up and has a daughter Migusa who is in senior high school when she reunites with her brother Takenori who was separated from her at birth. Due to the reunion, memories of her miserable childhood come flooding back. With the support of Migusa, Terue decides to head to Taiwan to look for her late father's grave and finds out the truth behind her mother's behaviour after meeting Toyoko there.
*Based on the novel Ai wo kou hito by Harumi Shimoda.