Congratulations! Lina and Momonga!

'''Congratulations! Lina and Momonga!''' (祝邂逅！リナとモモンガ！) is a collaboration game event in Mass for the Dead with characters from Overlord and Slayers. It was released on June 15, 2020 to July 15, 2020.

Background
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Incident
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Aftermath
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