The members of this “happy family” all had a secret side.

Kinuka Saijyo (44) (Hikari Ishida) took advantage of her husband Makoto’s (46) father’s death to move into the house that her father-in-law left behind in Kamakura. Her mother-in-law Chizuko (56), the father-in-law’s second wife, had a wild and flashy personality that made Kinuka uneasy, but she hoped to open a flower arrangement classroom, and she also hoped her family of four could relax in the spacious house.

On the day of their moving-in party, however, those hopes were dashed, as Itsuki Seno (38) (Tsubasa Imai), Kinuka’s ex-boyfriend, suddenly appears at her side. He says, “I’m being chased by a debt collector, and I need a place to hide.”

She was scared, so she tried to send Itsuki away, but he disappeared… However, he had settled into the Saijyo family’s garret. Since then, he begins to discover the family’s true selves from the garret.

The son who has been got bullied. The daughter who suffers from a serious problem with her boyfriend. The husband who is with a promising future in a stock company and surely he should be a good father at home but…? What was a real purpose of the mother-in-law who invited the family members to live together with her…?
In addition to her family members, even her best friend has a huge secret…
Kinuka is gradually cornered and at the same time, her feeling moves towards to Seno… Meanwhile, one murder case changes all people’s fates dramatically.

Kinuka gradually learns her family’s true faces and the secrets that they kept silent about. Why in the world did Itsuki really settle in the garret, and how will Kinuka face her broken family?

When everything behind the scenes becomes clear, the shocking conclusion! The situations of these hopeless adults get complicated in this tangled story!