Happy Synthesizer2,291 Views SingersGekiyakuVVocaloidKazehikiVVocaloidProducerKagamine Len! (DESI VER.)ProducerViews BreakdownYouTube2.3K ViewsDaily Views44/2214/2334/2454/2544/2634/2724/28VideorefreshRefresh Song DataListenYouTubeVocaDB