【Sukone Tei +Kagamine Len (健音テイ＋鏡音レン V4X)】 Happy Synthesizer 【UTAUカバー/VOCALOIDカバー】【60 FPS MMD PV】

I’ve been wanting to do another duet using these two for a while, so I chose Happy Synthesizer! Their voices really do mix surprisingly well! It ...