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Silver Week has arrived but Nagi has no interest to set to Las Vegas and retrieve her late father's possessions, rathering to spend the day with Hayate instead. Later she pays a visit to the Violet Mansion, just to find that Ruri is alone there. Unable to leave when it starts raining, Nagi manages to have Ruri confess that her true intention is to obtain the elusive "Black Camellia", a treasure believed to be in possession of the Sanzenin family and Nagi asks her grandfather by phone about it. However, Mikado refuses to say anything beyond the fact that the treasure was stolen 13 years ago and she breaks her smartphone in anger. When the rain worsens into a storm, the two girls struggle to keep the house by themselves when Ruri saves Nagi from being hit by a large tree branch carried by the wind. When the storm passes, Hayate appears at the mansion and he gets a call from Mikado who reveals to Nagi that the Black Camellia was stolen by her father.