Detective Suzunosuke Shikahama is currently suspended from work after a screw up. He gets together with Haruhi Mabuchi from the Administration Bureau, Sesuna Tsumiki from the Community Safety Bureau, and Ruka Kotori from Accounting. All from different departments and carrying their own baggage, the four join forces. They’re not exactly what you would call champions of justice. They’re not even ambitious enough to go for success. All they want is the truth.

Ordinary salaryman Hamasaki Mitsuo works for a company which installs vending machines. He complains about his marriage life while at the dentist office. Mitsuo isn't happy at all with his marriage with his wife, Hoshino Yuka, who has the complete opposite personality from him. He doesn't know if he loves Yuka or not. At this time, Mitsuo meets Kono Akari, his ex-girlfriend from his university days, who is now married to Uehara Ryo.

Maki Maki, Sebuki Suzume, Beppu Tsukasa and Iemori Yutaka happen to meet and form a quartet. They even begin to live together in Karuizawa during the winter, but there is a big hidden secret.