A self-indulgent creation.
The Sekai. A place born from true feelings. You can enter and leave by playing the song "Untitled." "The World of Windows" is a Sekai formed by the overlapping of your feelings and the feelings of others. Hatsune Miku resides in this world. At first, it is the World of Closed Windows. The world is dark, with countless closed windows floating in the air. If the plants of this world absorb any more negative emotions, the Sekai will collapse. Miku wants to deliver her song to you. Whether it reaches you or not, and whether you save her or not, is up to you. If Miku's song reaches everyone, the windows of the Sekai will surely open and it will become bright. The World of Open Windows. The world brightens. The ground is covered in water, and the countless windows are opened. The plants of the world have turned into small flowers. I'm sure it will reach, I'm sure it will be seen That future I want to meet so badly I kept singing about it in my lonely world I heard it just now, look, just a little bit I felt you, our melodies are linking up Now we connect, now we overlap There are so many things I wanted to tell you, what should I do? With a face I've never seen, you say you're no good But don't push the ideal version of yourself in the future onto who you are now too much Until the day comes when we show each other sights we've never seen The painful things, the times you want to cry Let's share the burden once in a while Hello Sekai, is my voice reaching you properly? It's okay, more than I thought; you aren't alone Hello Sekai, your voice is reaching me properly too It's better than I thought; I'm not alone either Here we go, jump jump jump Bouncing dance dance dance Let's just step on the unnecessary anxieties and keep going Whether it's this or that, it doesn't matter, let's just do what we want to do One more time, jump jump jump Spinning dance dance dance The future we want to go to is surely almost here Whether it's this or that, it doesn't matter, let's just do what we want to do Let's dive in, even if we don't know If our Sekai is the right answer or the wrong one The feelings I have, the wishes you lack I'm sure they won't disappear, the Sekai will never end Now we connect, now we overlap Look, I can hear it, look, it's getting through to us.
She wishes for the "owners of feelings" to find their "true feelings" and tries to deliver her song to them, but her song is mixed with noise and fails to reach them, causing her great distress. She takes this form when her song cannot reach others. In this state, she can only sing the lyrics: "I'm sure it will reach, I'm sure it will be seen, that future I want to meet so badly, I kept singing about it in my lonely world."
The true form of Hatsune Miku in the World of Closed Windows once she becomes able to deliver her song to the "owners of feelings." She takes this form when her song reaches them.

I'm sure... it will reach. I'm sure... it will be seen... Singing from your smartphone
Release Date 2026.08.18 / Last Updated 2026.08.18