This is my fourth পছন্দ Honeyworks song as well as one of my পছন্দ Rin and Len duets so far. Classic. It's an old one with some poor tuning, but the song itself has really shaped the VOCALOID industry and its personification of the libraries.
This is one of my পছন্দ Regulus songs as well as one of my পছন্দ Megurine Luka songs. I remember listening to this just a few hours after it was released.