Ayano's Theory of Happiness15,877,756 Views SingerIAVocaloidProducersJINProducerZukioProducerNakanishi RyousukeProducerViews BreakdownYouTube12M ViewsNiconico3.1M ViewsYouTube253K ViewsDaily Views16412/184.4K12/192K12/202.2K12/212.1K12/223.3K12/232.5K12/24VideorefreshRefresh Song DataListenYouTubeNiconicoVocaDB