裏世界は世界の裏5,308 Views SingersKotonoha Akane (A.I.VOICE)Other Voice SynthesizerKotonoha Aoi (A.I.VOICE)Other Voice SynthesizerProducersemicolonProducerViews BreakdownNiconico5.3K ViewsDaily Views911/01811/02411/03211/04511/05711/06511/07refreshRefresh Song DataListenNiconicoVocaDB