The hearts of Pandora. Book 4. Motizuki Jun

Oz parted with his saviors, Eliot and Leo - and not in the best way - and returns to Blake and Sharon in upset feelings. However, Uncle Oscar slightly discharges the oppressive atmosphere, offering to note the successful end of their sortie into the academy. A day later, Oz and his comrades go to a meeting with the head of the Great House Balm, hoping to shed light on the events of a century ago. But there another secret awaits them - the past of Blake, which he never managed to betray...