EvanZONE ReflectionWERsig 2 bass so Happy ハイスピードver is a fad started in 2012 by Nico users that has since spread to Youtube. This is a makeshift medley using a really fast tempo (243 beats per minute is the original version's bpm) and altering the tempo of all the songs featured. The title of this "medley" is the abbreviation of all the songs featured:
'''EVAN'''s, RED '''ZONE''', Sakura '''Reflection''', FLO'''WER''', sig'''sig''', bass '''2 bass''', I'm '''so happy'''

This song inspired a lot of other high speed medleys, such as AniHeaven and OwenScarlet.