Dungeons and Dreamers by Alex Lidell

Two dark pasts. One bond beyond their control.

For a month, Coal has tried to stay away from the beautiful cadet who makes him feel things he shouldn’t, each day of separation spiraling him deeper into worsening nightmares. Already on edge, it takes Coal one split second to plunge into violence—and find himself in shackles once more.
Lera has finally struck a tentative peace with the stone-cold deputy headmaster—that is, until she disobeys River’s direct orders and inserts herself into Coal’s troubles. Now, locked away in the academy’s dungeon, Lera’s darkest memories come to life. And someone else’s along with them.
As the magical bond between Lera and Coal awakens, there’s nowhere to run—and nowhere to hide.