This manga is based on real event of a Austria prince i m history student so i love such plots most especially with reality since i know the real prince ending with his queer behave didn't end well for him so if manga gonna follow same path it's must to get ready for sad ending with dramatic ways plot will make i m excited!!
[From adoptamanga] The House of Habsburg: rulers of Austria, the only noble family with the power to rival that of the Church since the Middle Ages, and bearing the title of Holy Roman Emperor. The Crown Prince Rudolf and an orphan named Alfred find themselves entwined in a shared destiny, catalyzed by the “Lake Incident”.
I feel like I've read this or something similar, I think it may have been by the same author but I really enjoyed it, hopefully this is just as good and probably just as heart breaking :')