Mushoku Tensei: Roxy Gets Serious Vol. 6 (manga)

ELEMENTARY, MY DEAR ROXY!

Now that she's all settled in at the Ranoa University of Magic, Roxy dives headfirst into her studies. When one of the library's tomes goes missing, Roxy takes it upon herself to track down a replacement copy. Unfortunately, the replacement book winds up being stolen merchandise, and Roxy gets thrown into jail under suspicion of grand theft spell-tome! With a false accusation hanging over her head, can Roxy and friends clear her good name and track down the real book thief?