While Alex was sleeping because he finally awakened his unique ability, Leon and the girls decided to play a game. Saeko didn't play because she was chosen to stay behind and watch over Alex, she would be the one to explain to Alex where they went.
The five entered different dungeons with different difficulties; Leon, Maria, and Sakuya's dungeons had the same difficulty, while Gracier's dungeon got the lowest. Artemia selected a dungeon of the highest difficulty because she was the strongest of the five, a demigod rank.
At first, the other four didn't want her to participate, but she refused to back; she even selected the dungeon of the highest difficulty to show them she wouldn't back down no matter what they said. They knew it was a game, so naturally, to make it more fun, they shouldn't refuse anyone.
Half of an hour after the game began, Gracier had already arrived on the fifth floor, the first boss room of the dungeon.