Akashic Records of Bastard Magic Instructor manga volume 9 features story by Hitsuji Tarou and art by Tsunemi Aosa.

The Celestial Temple of Taum contains an ancient planetarium built by the mages of old, and Glenn’s brought the whole class for a bit of archaeological exploration. Just when everything looks set to wrap up quietly, Sistine and Rumia accidentally discover the temple’s secret: a mysterious portal leading to parts unknown. When Celica suddenly leaps through to mysteries beyond, there’s no choice left but to follow her to the other side and stage a dangerous rescue!