The game is set in Shibuya, Tokyo. A girl named Hoshino Ichika, walks through the streets and sees an LCD screen displaying Hatsune Miku. Upon returning home, she discovers a song named "Untitled" on her smartphone. Out of curiously, Ichika plays the songs, only to get surrounded by a white light and arrive at an unknown place. Miku stands in front of Ichika, welcoming her to Sekai, and inviting her to sing together.

The game is set in Shibuya, Tokyo. A girl named Hoshino Ichika, walks through the streets and sees an LCD screen displaying Hatsune Miku. Upon returning home, she discovers a song named "Untitled" on her smartphone. Out of curiously, Ichika plays the songs, only to get surrounded by a white light and arrive at an unknown place. Miku stands in front of Ichika, welcoming her to Sekai, and inviting her to sing together.