Snagging a new job at Heart Sports' sales department, Kanji transfers to the Tokyo office, where he meets his new colleague Rika and is reunited with his best friends from home—Mikami and Satomi. Mikami, Kanji, and Satomi have been friends since they were children, having grown up in the same small town. Mikami is Kanji's best male friend and Satomi is their platonic female friend whom both Mikami and Kanji have had a crush on since high school. After seeing Mikami forcedly kissing Satomi, Kanji felt despair, however, then quickly developed strong affection for Rika who was always energetic, funny, encouraging and caring. Their relationship was rather unstable to begin with, given Kanji's history with Satomi as well as Rika's (not so) secret affair with her and Kanji's boss Sendo [this affair was much more of a determinant in the original manga than in the drama, when Rika got pregnant bearing Sendo's child (not shown in the drama version), which was one of the reasons why Kanji chose Satomi over Rika]. In the meantime, denied by Satomi who thought Mikami was just playing with her, Mikami's attempts on pursuing his med school classmate Nagasaki had also been with much frustration.

Xue Hua (Snow), Lang Hua (Spray), Huo Hua (Sparks) and Yan Hua (Fireworks) are four orphans with musical talents. They grew up together and became sisters. However, Xue Hua is found by her aunt, who brought her to France, and Huo Hua is adopted by the Ye family. From then on, Lang Hua and Yan Hua promised each other never to be seperated. Sixteen years later, Huo Hua, who is now called Ye Fan went to France in search for her sister Xue Hua, who everybody calls Angel White. However, Angel was suspected to be dead and the prime suspect was no longer than her boyfriend Qi Yuan. When Ye Fan found out about Angel's death, she seduces Qi Fei, the younger brother of Qi Yuan, in order to seek for revenge and find out the truth about Angel. Meanwhile, Lang Hua, now called Bai Hai Hua, and Yan Hua, now called Bai Meng Hua, grew up together and each already had their own job. Hai Hua soon fell in love with Geng Ruo Chen, while Meng Hua struggles between Han Li and Xu Hao. Finally all secrets will come to light, true love conquered all obstacles, and the four sisters reunite once again.

Kuraishi Yoshio is a coroner known for his keen powers of observation and his thorough investigations. The term “rinjo” is said to be police slang for the initial investigation carried out at the scene of the crime.

Seo In Hwa is a college student studying painting at a prestigious university. In Hwa wants to live her life differently from her mother who ran a hostess bar, but she is trampled over by power and money. Because of this, In Hwa becomes a hostess in a drinking establishment. She overcomes hardships to become the best in her field. In Hwa then seeks revenge on the men in power who destroyed her life and let her mother die...

Mei has been in love with Yuya all her life. They've grown up together. But when they reach their second year of middle school, Yuya suddenly professes his love for her older sister, Haruna.

Struggling to rebound from her decade-long crush, Mei finds comfort in the close camaraderie of her school friends, Taka, Mia, Yuri, Natsu, Mitsu and Sara and then meets a reticent and gentle-natured boy named Atsushi. The two begin to realize that they share many things in common that seem to transcend mere coincidence: the same birthday (February 29th, 1992) and a previous encounter when they were both 8. Feeling a bond of fate, they grow closer.

But destiny can have a dark side to it, too, and a shocking revelation from both of their pasts compels Atsushi to pull away from Mei. The devastating separation then unleashes a wave of misfortune upon Mei: the death of a loved one, drug addiction and domestic violence. As circumstances seek to take control of her life, Mei struggles to maintain her faith in the tenuous thread of destiny that will reunite her with her true love.

The story is about an invisible/ghostly twin following her sister.