Gakumasu is the short name for Gakuen Idolmaster, a Japanese idol training game in The Idolmaster series. Its menu sounds, including this confirmation chime, are short, bright and instantly recognisable to players who spend long sessions navigating menus, choosing lessons and managing idols. Clips of those interface sounds circulate among fans, who reuse them in edits, streams and memes to signal a decision or a small victory, which keeps the sound familiar even outside the game itself.