Vermeil in Gold: The Failing Student and the Strongest Scourge Plunge Into the World of Magic

A student at the magic school, Alto, who was on the verge of repeating the school year, accidentally found a book that activated a magic circle, and as a result, summoned the sealed devil Vermeil! Vermeil is a very unhealthy older sister with a power devastating enough to be called a disaster!

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Links:

• Alternative Official English - Manga UP!