This song is just truly spectacular. Notably just how the notes flow smoothly and seamlessly like silk. That is why I love 猫叉Master's music so much. It's so pleasant on the ears.
One of my fave song in Beatmania IIDX 12 Happy Sky. No vocal, however the instrumental are so strong and lively. I used to hear this song while writing fanfiction about RPG Adventure and it works well.