暗い月曜日4,796 Views SingersMEIKOVocaloidHiyama KiyoteruVocaloidMidorizaki KasumiCeVIO AIProducerkeystoneProducerViews BreakdownNiconico4.8K ViewsDaily Views04/0104/0204/0304/0404/0504/0604/07refreshRefresh Song DataListenNiconicoVocaDB