Y/N is a normal high school student who has a passion for music, or perhaps she's even dabbling in music production on her laptop, dreaming of working with real musicians one day.
One morning on a small autumn break when Y/N wakes up she opens the door of her living room, she's greeted by the unexpected sight of Teto and a handful of other Vocaloids in her living room. They're as surprised as she is, and each of them has a unique reaction-some are curious, others a bit skeptical or playful. Teto could stand out by being the most enthusiastic, immediately fascinated with Y/N and her home.