Olimpos manga

Olimpos summary:

Ganymede, the youngest prince of Troy, is trapped in a world of eternal night and beautiful white flowers that never wilt. Apollo - the man responsible for his imprisonment - visits him often, never quite telling him what he has been brought there for. The all-powerful Zeus, the omniscient Hades, the inquisitive Apollo -- this is the tale they weave, using Ganymede's presence to fulfill their whims...