CircusP feat. GUMI, (Megurine Luka) – Happy Synthesizer
4:04
Vocaloid Megurine Luka and Megpoid Gumi / Вокалоид Лука Мегурине и Мегпоид Гуми – Happy Synthesizer
2:15
EasyPop feat. Megurine Luka and GUMI – Happy Synthesizer -10th anniversary Remix- (Bonus Track/Length for SNS use)
2:22
Easy Pop feat. Hatsune Miku, Kagamine Rin, Megurine Luka, MEIKO – Happy Synthesizer (SEKAI ver.)
4:08