How NOT to Summon a Demon Lord (Manga) Vol. 25

DARKNESS GATHERS ANEW AT THE ACADEMY OF MAGIC!Rumors swirl about a macabre ritual brewing at the Magic Academy! Diablo and friends launch an investigation, but as female students disappear one by one, the clues begin to point to human sacrifice! Can Diablo stop this dark undertaking, a ritual that could summon the God of Destruction?