Sakuraba Haruma's childhood friend Inukai Shuji was a cut above him in every way imaginable, living out the glamorous life bestowed upon him. Haruma, an unassuming salaryman, has lived his every day clutching onto his inferiority complex, existing only in Shuji's shadow. One day, Haruma coincidentally meets Shuji's wife, Inukai Reika, who Haruma has always secretly admired since his high school days. With feelings of envy, jealousy, and more, a "secret" is born from Haruma's repetitive days.
Sakuraba Haruma's childhood friend Inukai Shuji was a cut above him in every way imaginable, living out the glamorous life bestowed upon him. Haruma, an unassuming salaryman, has lived his every day clutching onto his inferiority complex, existing only in Shuji's shadow. One day, Haruma coincidentally meets Shuji's wife, Inukai Reika, who Haruma has always secretly admired since his high school days. With feelings of envy, jealousy, and more, a "secret" is born from Haruma's repetitive days.
Kurihara Mia works for the public relations department of a company. She falls in love with her company’s vice president Miyoshi Kairi after he helps her locate her missing engagement ring during a business trip. Mia does not realize who he is until he comes to the public relations department as part of training. She finds herself having to work with Miyoshi as his trainer. He is severe at times and yet gentle at others. Mia’s heart is captured by him little by little. But Miyoshi already has a wife.
Housewife Sasamoto Sawa works as a part-time supermarket cashier. One afternoon, she unconsciously pickpockets a lipstick at the supermarket. Takigawa Rikako sees a part of this. What she proposes is Sawa's assistance in setting up an alibi for her affair in exchange for her silence on that matter. Sawa obeys the demands of Rikako in order to protect her "happiness" even though she is falling apart emotionally. In the process, she meets high school teacher Kitano Yuichiro and gradually cannot stop thinking about him. Before long, she crosses a line which she should not.
2 months after their wedding, Yeon Yi's husband, Jin Woo, gets into an accident and falls into a coma. During this time, Yeon Yi's life shatters from the seams. She misses her deadlines for work, while she has only videos of her wedding to comfort her. Then Yeon Yi waits at the airport for Jin Woo's brother, Jin Ho, whom she has never met before. She is stunned when she meets him, because Yeon Yi never knew Jin Woo and Jin Ho are identical twin brothers. Although Jin Ho and Yeon Yi's relationship is cold at first. they soon become attracted to each other. Their relationship becomes even more volatile, when Jin Woo suddenly awakes from his coma
Hee Tae met his future wife, Il Ri, when he worked as a temporary biology teacher at an all-girls high school. Il Ri was a student there. Now, Hee Tae works as a fishery researcher and spends his days in a typical marriage. One day, he learns that his wife is having an affair with a carpenter. He becomes angry for the first time, how is he going to handle this new revelation?
