The Kyobashi family, who live in the suburbs, adheres to a strange agreement that every family member must hide nothing from their loved ones. Their lives seem harmonious and happy, but each of them hides secrets in their hearts that they don't want to tell. The eldest daughter Mana (played by Suzuki Anne) has been wandering around the shopping mall, and she is even more troubled when she learns that she was born in a love hotel; her father Takashi and his wife Eriko (played by Koizumi Kyoko) have lived a sexless life for 5 years, and he had to secretly seek comfort outside, still pretending to be happy on the surface; the truant son found a tutor, but eventually became his father's lover; Eriko, who made the "no secrets" rule, carefully took care of the housework and prepared meals, just like a happy housewife, but she also had secrets buried in her heart for many years. This happy family is like a garden in the sky, out of reach...