I Want to Be Your Heart2,824 Views SingersMujikaUTAUAdachi ReiUTAUProducerakimaru_0127Cover ArtistViews BreakdownNiconico2.8K ViewsDaily Views2.8K9/0209/03-2.8K9/042.8K9/0519/0629/0709/08refreshRefresh Song DataListenNiconicoVocaDB