Happy☆Material24,252 Views SingersKizuna Akari (VOICEROID2)Other Voice SynthesizerTouhoku Kiritan (NEUTRINO)Other Voice SynthesizerTouhoku ItakoOther Voice SynthesizerKoharu Rikka (Unknown)Synthesizer VKotonoha Akane (A.I.VOICE)Other Voice SynthesizerKotonoha Aoi (A.I.VOICE)Other Voice SynthesizerTouhoku ZunkoOther Voice SynthesizerNatsuki KarinSynthesizer VTsuina-chan (Unknown)Synthesizer VKyomachi Seika (Unknown)Synthesizer VHanakuma ChifuyuSynthesizer VProducerKamikita Kudryavka Cover ArtistViews BreakdownNiconico24K ViewsDaily Views211/01511/02511/031111/04011/05511/06511/07refreshRefresh Song DataListenNiconicoVocaDB