Kip. 1: A Steamy Special: A Certain Demon's Plan to Defile an Angel's Pure Skin

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As the girls go on a trip to a hot spring inn, Satanichia seems determined to get Gabriel to get in the baths with her. After eventually managing to convince Gabriel to do so, Satanichia brings out a giant slime to attack her, only for it to ensare everyone else instead. (Source: Wikipedia)