SYI\IDI8 is a virtual girl group consisting of four members: Canary, Nest, Goyo, and Raven. The members, who gathered around Nest, belong to different races in Nansy Land, where they use voice magic. Nest is the daughter of a scientist from the Great Horned Owl (Bubo virginianus) tribe, Canary is the daughter of a chieftain from the Canary (Serinus canaria) tribe, and Raven is a hunter from the Common Raven (Corvus corax) tribe. However, Goyo is the only human in Nansy Land. Each member of SYI\IDI8 uses unique magical tools to perform voice magic, and their magical power is amplified when they are together. Nest's father was a scientist researching the magical source MVP, created through unknown technology. During his research, a wormhole formed due to an MVP energy explosion, and he was sucked into it. While everyone believes Nest's father to be dead, Nest receives mysterious signals through a device left by her father. Sensing that the signals are from her father, Nest sets off on an adventure to find him, accompanied by her childhood friend Canary. During their journey, they fatefully encounter Goyo and Raven, and the four of them embark on a quest to find the magical source together.

While everyone believes Nest's father to be dead, Nest receives mysterious signals through a device left by her father. Sensing that the signals are from her father, Nest sets off on an adventure to find him, accompanied by her childhood friend Canary. During their journey, they fatefully encounter Goyo and Raven, and the four of them embark on a quest to find the magical source together.