Synopsis: Betsu ma: Betsu ni Iyarashi Imi Jyanaku Isshou ni Sun Demo Kamae wa Nai yo Margaret

For 300 years, an enigmatic blue mist has emanated from the earth, granting immortality, instant healing, and an end to illness to all living beings. With the halting of the aging process, creatures have remained eternally youthful since exposure to the mist. Paze Diamond works as a chimney operator responsible for managing the flow of the blue mist within his state. Despite being recognized locally as a clumsy and unfortunate individual, Paze yearns for happiness, although he struggles to define what that means to him. Notably, Paze begins to spot blue birds visible only to him just as the stunning and affable Margaret Howell falls out of the sky and into his path. As Margaret takes an interest in Paze, could she serve as the happiness he seeks?