Yeah the one there 100% is #6 pure white panties (I don't remember what I translated it to off hand, but something like that). I'm currently at work so I can't check when you're at the party garden where the event square is to trigger the boss fight (I assume it's pretty much right as you get in).Wait really? I was referring to the area mentioned by RagueltheUFO on Page 4. Pic for reference:
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If you lose that boss fight I know you're allowed (forced) to walk around the area, so you can grab them at that point, but yeah I'll let you know later