Labyrinthos has four different game modes.

The Duel mode, Gate Raid mode, Arcade mode, and Story mode.

Laura had never played Story mode.

It was a tutorial introducing the story of each character appearing in Labyrinthos, along with instructions on how to control them. There was no need for a tutorial now.

In general, Story mode is something beginners play to learn character controls. Even when new characters are added, few people bother playing the Story mode. It’s easier to learn the controls in a custom room. There's no real need for the long, boring, and somewhat pretentious story mode.

In that sense, Hanabane Lui was an odd one.

Whenever a new character was added, Lui always played through the Story mode.