Ouji-sama Lv1 is an RPG game made by Alice Blue, a subsidiary of Alice Soft. This was their second released project. This game is one of the few Alice Soft non-18+ related games, though the addition disc adds yaoi to the game.

The protagonist is Canaan, the second prince of Luukius kingdom, a small country. He didn't have a special training, so he has the strength of any average boy.

One day, an adventurers guild is formed. They want to break the seal of a labyrinth that was closed a long time ago. Then, Canaan and his servant Celest join the adventure...