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"Shinya Hīragi's Birthday Carnival: Shall We Make White And Black Clear?" (柊深夜の誕生日カーニバル ~白黒はっきりさせようか~ Hīragi Shinya no Tanjōbi Kānibaru ~ Shirokuro Hakkiri Saseyō Ka ~?) was an item collection event that was held in Seraph of the End: Bloody Blades from November 20 to December 4, 2015.