A Sekai born from the feelings of four people betting on their dreams. The alleys are covered in graffiti art and posters for live events. Miku and the others in the Street Sekai gather at a cafe along the street. As fellow musicians, they act as advisors for Kohane and her friends.

Personality: Bright, kind. First person: I (polite/feminine). Tone: Gentle. Gender: Female. The Miku of the Street Sekai. She is a bad cook.

Personality: Bright, energetic, kind. Rin: First person: I (cheerful/feminine). Tone: Bright. Gender: Female. Len: First person: I (casual/masculine). Tone: Bright. Gender: Male. The Rin and Len of the Street Sekai. They are close twins, but they do have fights sometimes.

Personality: Bright, kind, free-spirited. First person: I (polite/feminine). Tone: Bright. Gender: Female. The Luka of the Street Sekai. She can produce any kind of singing voice.

Personality: Bright, kind, reliable. First person: I (polite/feminine). Tone: Gentle. Gender: Female. The MEIKO of the Street Sekai. She is a good cook.

Personality: Kind, bright. First person: I (soft/masculine). Tone: Gentle. Gender: Male. The KAITO of the Street Sekai. He often gives advice and listens to people's troubles.

Personality: A bit introverted, kind, shy. First person: I (polite/feminine). Tone: Gentle. Gender: Female. A member of Vivid BAD SQUAD. Characterized by a clear, transparent voice, she is An's partner.

Personality: Kind, bright, straightforward. First person: I (polite/feminine). Tone: Bright. Gender: Female. A member of Vivid BAD SQUAD. Characterized by a powerful singing voice, she is Kohane's partner.

Personality: More competitive than anyone, tsundere. First person: I (casual/masculine). Tone: Tsundere. Gender: Male. A member of Vivid BAD SQUAD. Characterized by a high-impact voice, he is Toya's partner.

Personality: Serious, cool, kind. First person: I (casual/masculine). Tone: Cool. Gender: Male. A member of Vivid BAD SQUAD. Characterized by a cool, refreshing voice, he is Akito's partner.