Relentlessly upbeat idol-pop energy straight off a PS3 game disc. OreImo Happy End's special track CD captures that whole Akihabara otaku culture vibe in audio form, and honestly it's kind of infectious. "A-K-I-B-A no Tenshi" spells it out literally while laying down this bubbly synth-pop beat that you will absolutely get stuck in your head.
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"Black Cat Holiday" has a playful, jazzy swing to it that stands out from the sugar rush around it. "Yuugure Refrain" slows things down with this evening-colored nostalgia that actually catches you off guard after thirty tracks of sunshine.
The whole thing feels like a Comiket haul in album form. If you watched the anime and never checked the PS3 game music, you're missing the other half of the picture.