This is Cirno's theme from Touhou. The song's original name (from the game) is "The Story Of A Love Struck Tomboy" or something like that. Another remix of the song called "Cino's Perfect Math Class" by IOSYS has become fairly popular. See how this is, I figured I should name my remix something similar to IOSYS's remix rather than the original song. More people are familiar with "Cirno's Perfect Math Class" than " The Story Of A Love Struck Tomboy".