Gakumasu is the common short name for Gakuen Idolmaster, Bandai Namco's idol-training game released in Japan in 2024. Its interface uses short, polished confirmation tones for tapping through menus, scouting and training choices, and in-game selections. Fans extracting and sharing those UI clips on soundboards label variants like this one confirm2 to separate similar button sounds. Outside the game the clip works as a generic anime game confirm effect, which is why editors reuse it for choices, captions and menu parodies far beyond Idolmaster gameplay.