Four tracks of Ryutaro Nakahara going full throttle under his Seiryu alias, and every one of them slaps at 190+ BPM. This bonus disc from the starmine album collects long versions of his beatmania IIDX contributions, and "waxing and wanding" is the standout, a DANCE SPEED beast that originally dropped in IIDX 13 DistorteD and still hasn't aged.
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Synth layers stack relentlessly over driving kicks. "3y3s" brings a slightly different texture but keeps that same frantic energy, while "blue moment" pulls back just enough to let the melodies breathe before the tempo swallows you again.
Only four tracks but zero filler. If you've ever coin-dropped on a Bemani cab, this is essential listening.