black_heart choujigen_game_neptune cleavage game_cg kami_jigen_game_neptune_re;birth3 leotard neptune no_bra pururut tsunako white_heart

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What are they arguing and why are Neptune and Pururut hiding behind?
They only insult each other and Neptune tells Pururut to hide because Blanc is scary when it is transformed, nothing important actually happens