Seiichi and Saria train under Artoria to become adventurers. During their training the three of them are teleported into a dungeon by a demon’s trap.

The dungeon they find themselves in the stronghold of the Black Dragon God, the strongest member of the Demon Lord’s Army. Artoria gets separated from Seiichi and Saria in the dungeon and the giant Black Dragon God appears before her. Then that overwhelming threat attacks! Can Seiichi and Saria save her in time?!
An adventurer needs the 
ability to sense danger.
يجب أن يمتلك المُغامر
القدرة على الإحساس بالخطر
A un avventuriero serve 
la capacità di percepire il pericolo!
Um aventureiro precisa da
habilidade de pressentir o perigo.
Авантюристу нужно уметь 
предчувствовать опасность.