blood+ blood_the_last_vampire crossover darker_than_black hei heroes_phantasia kazuma_(s-cry-ed) keroro_gunsou lina_inverse louie mahou_senshi_louie mai_hime majutsushi_orphen orphen otonashi_saya read_or_die s-cry-ed seifuku slayers suou_pavlichenko yomiko_readman

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Could somebody explain this?
A PSP crossover RPG, seems.
Now if only they'd bring it out here in the states. It looks cool from just the cover.