Four tracks to mark GWAVE's fifth anniversary, and honestly the restraint is admirable. "はーてにゃ？" (Huh?) opens with playful vocal energy and then you get the instrumental version right after, so you can hear the arrangement naked.
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Same deal with "love-go-round," vocal then instrumental. Two songs, four tracks total. It's basically a single release disguised as an anniversary disc. The instrumental versions reveal how solid the underlying compositions are beneath the vocals.
Quick, celebratory, done. No filler because there's literally no room for it. If you're collecting GWAVE releases, this is the completionist checkpoint between the main volumes.