Happy☆Material24,480 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 Views612/17712/18312/19412/20112/211112/22712/23refreshRefresh Song DataListenNiconicoVocaDB