A Terrified Teacher at Ghoul School manga volume 7 features story and art by Mai Tanaka.

At last, summer vacation is here! It's the season of fun, and Haruaki's starting it off...by being hospitalized?! This paves the way for a spooky hospital incident at night, and that's only the tip of the iceberg! Sano experiences a strange event at work, we learn the mysteries behind a youkai's birth, and a secret Sano's been keeping is revealed...