Butterfly Lyrics
| Song | Butterfly |
| Artist | 4st |
| Artist | 鏡音レン |
| Album | TV数码宝贝1~4OP+不再犹豫（鏡音レン） |
YouTube Results (More on YouTube)
| Song | Butterfly |
| Artist | 4st |
| Artist | 鏡音レン |
| Album | TV数码宝贝1~4OP+不再犹豫（鏡音レン） |