Uninhabited Sekai (誰もいないセカイ, Daremoinai Sekai) is 25-ji, Nightcord de.'s
Sekai, initially created by Mafuyu's true feelings.
It is accessible via the song "Kuyamu to Kaite Mirai".
Kanade, Mafuyu, Ena, Mizuki, Miku, Rin, Len, Luka, MEIKO and KAITO have conversations here. Additionally, area items that increase the power of 25-ji, Nightcord de. and VIRTUAL SINGER cards can be found here.
The Sekai is a barren world with nothing but a few dim rays of light and endless terrain. Within it, Miku wanders the endless landscape alone, singing into the void.
This Sekai is, as the name suggests, empty. The only changes to the smooth gray landscape are geometric shapes and steel girders that protrude from the ground. Rays of light come from an unidentified source, described by Kanade as brighter than her bedroom at night, but not as bright as the sun.
The landscape of the Uninhabited Sekai goes on forever, with Kanade even once getting lost with no hope of returning to the main clearing, only able to return there by exiting and re-entering the Sekai through pausing and replaying Kuyamu to Kaite Mirai.
There are elements of the Sekai that exist, but cannot be seen initially due to Mafuyu not noticing them - a primary example being the marionette doll from the Imprisoned Marionette event story, which Miku says "has always been in Mafuyu's SEKAI. You never noticed it, that's all."[1]
Given the lack of activities in the Uninhabited Sekai, the members of Nightcord actively try to give Miku things to keep her occupied. Mizuki taught her how to play cat's cradle[2], and the members regularly stop by to show Miku progress on their newest song and music video.
Areas[edit | edit source]
Main[edit | edit source]
The main area of the Uninhabited Sekai is automatically unlocked straight away and was previously the only visible section of the Sekai from the World Map. It contains area conversations as well as the area items shop where players can purchase and upgrade items that increase the stats of specific character cards.
Lake[edit | edit source]
The lake area of Uninhabited Sekai is unlocked by reading every episode of the "Searching for a Reflection Beneath the Waters" event story - which is also the story it is first introduced in and discovered by the 25-ji, Nightcord de. members. It is an extension of the Sekai based on the growing feelings of the members.
As opposed to the main area of the Sekai, the lake doesn't have any area items, nor an area item shop, but it does have its own area conversations between the members.
Area Items[edit | edit source]
| Icon | Name | For | Attribute |
|---|---|---|---|
 |
Music Box (オルゴール ) | Yoisaki Kanade | 
|
 |
Aquarium (アクアリウム) | Asahina Mafuyu | 
|
 |
Ena's Painting (絵名の絵) | Shinonome Ena | 
|
 |
Cute Outfit (かわいい服) | Akiyama Mizuki | 
|
 |
Re-Tied Ribbon (繋ぎなおされたリボン) | Hatsune Miku |
|
 |
Nightcord Room (ナイトコードルーム) | 25-ji, Nightcord de. | 
|
 |
Broken Mirror (割れた鏡) | 25-ji, Nightcord de. |
|
 |
Music Speakers (ミュージックスピーカー) | VIRTUAL SINGER |
|
