Unlock Cyber Dive Outfit for Haku.
To unlock Haku's "Cyber Dive" outfit, you must clear "Kouya to Mori to Mahou no Uta" or, "Song of Wastelands, Forests, and Magic" on Hard, I believe from the top down it is the 20th song.
More tricks, tips and cheats for this game are right here - Hatsune Miku: Project Diva 2nd cheats
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