Elegant Yokai Apartment Life Vol. 3 (Kodansha, 2017)

Yushi has become the master of a grimoire brought back by Bookseller. What he first thought was a dream now has him training to become a mage. To make things more complicated, even Hase finds out about his newfound powers! The time has come for Yushi to tell his best friend about the grimoire and the apartment. Also, an unexpected individual's supernatural talents are revealed!