Possible old alias of
RIZNA?
interesting to note that Nanako Suzuki stopped participating in Doujin and little later RIZNA started.
But I only realized while I was hearing few of the C.H.S album. They sound quite similar to me.
few of the comparison: (Unlimited Spark; both by C.H.S)
http://www.youtube.com/watch?v=lmljA-GA8sk (Original by Nanako Suzuki)
http://www.youtube.com/watch?v=12L3KoZVXz4 (Remake by RIZNA)