Villainess Level 99 (Manga) Vol 02 I May Be Hidden Boss Not Demon

The Demon Lord will return! This truth, known only by a certain few, sweeps through the Royal Academy on the winds of rumor, and many suspect that Eumiella, with her otherworldly and unbelievable powers, is in fact the Demon Lord herself. It is then that the Academy's newly appointed headmaster assigns Eumiella the task of overseeing field training for the students of the regional nobility. Unfortunately, Eumiella doesn't have the faintest clue where to start, and the students are left more than a little panicked.  However, among the chaos there is Patrick, the one student really trying to understand Eumiella. One Peace Books
(W) Tanabata Satori (A) Nocomi