Queen War -YBI Plan-

Princess War -YBI Plan- (正妃戦争-YBI計画-) was a tournament event hosted in the Great Tomb of Nazarick between the Floor Guardians: Albedo and Shalltear Bloodfallen for the title of Princess of Nazarick. It will appear in Mass for the Dead on June 3, 2020 and ends on June 15, 2020.

Background
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Incident
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Aftermath
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