Happy Synthesizer1,073 Views SingersGekiyakuVVocaloidKazehikiVVocaloidProducerKagamine Len! (DESI VER.)ProducerViews BreakdownYouTube1.1K ViewsDaily Views79/2989/301810/01010/02010/03010/04010/05VideorefreshRefresh Song DataListenYouTubeVocaDB