Yakusoku (Idol Master)2,368 Views SingersHatsune MikuVocaloidMegurine LukaVocaloidVY1VocaloidLilyVocaloidProducerregulusProducerViews BreakdownNiconico2.4K ViewsDaily Views09/2909/30010/01010/02010/03010/04010/05refreshRefresh Song DataListenNiconicoVocaDB