25時、ナイトコードで。 (プロジェクトセカイ カラフルステージ！ feat. 初音ミク)

25-ji, Nightcord de. (also referred to as Nightcord at 25:00, Niigo, 25ji, and N25) is an underground music circle that comes from the mobile game Project Sekai COLORFUL STAGE! The group operates daily at 25:00 on the fictional online chatting app "Nightcord" (in reference to "Discord") with the main goal of theirs being to "save somebody" with their music. Niigo's songs often feature themes that reflect on their characters stories and feelings, most of the time being melancholy. Read more on Last.fm