The Royal Tutor manga volume 6 features story and art by Higasa Akai.

Heine and the princes have overcome many a difficulty together, deepening the mutual trust between the teacher and his pupils. But even though Heine has walked closely alongside the princes as they slowly come into their own, the royal tutor himself still remains a mystery to them. When Count Rosenberg claims to know who he really is, could Heine's secretive past become public knowledge?