Narrates the events and cases encountered by Kaoru Utsumi, a rookie detective, and Manabu Yukawa, a university associate professor, while the two pair up to solve many mysterious cases.

Follow the life of Michiru Aida, a beauty parlor assistant who returns to Tokyo after 4 years. Bullied by her seniors at work and abused by her boyfriend, she is reunited with her best friend during high school, Ruka Kishimoto, a skilled motocross racer. Takeru, a make-up artist, is introduced to Ruka by her housemate, Eri and thus begin a journey of friendship.