This is a drama CD and voice collection from the PS2 otome game Tensei Hakkenshi Fuumaroku, focused entirely on the character Kaiba Makoto. Twenty-one tracks of solo voice drama, which for this kind of release means you're getting extended character monologues, scene recreations, and probably some bonus comedy bits woven in.
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The background music that threads through these drama CDs tends to pull from the game's original score, so you catch fragments of the actual OST between dialogue sections. Very niche, very specific to its audience. If you played Fuumaroku and Makoto was your guy, this is basically a whole extra chapter just for you.