Project Sekai (otherwise known as HATSUNE MIKU: COLORFUL STAGE! to english fans) refers to the popular video game of the same name. Project Sekai is a rhythm game centered around 5 fictional bands. These bands are known as Leo/Need, More More Jump!, Vivid BAD Squad, Wonderlands x Showtime, and Nightcord at 25:00. These bands are often abbreviated to L/N, MMJ, VBS, WXS, and 25ji or N25. The game's mechanics boil down tapping and holding notes that appear on the screen in a predetermined order known as the chart with music in the background. While most music in the game is music that existed before the game, some of the music is commisioned for the game.