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?!
However, humans began calling the treasure 
chest a monster and persecuting it.
لكن بدأ البشر بنعت صندوق الكنز
بالوحش واضطهاده
Sin embargo, los humanos pensaron que
era un monstruo y lo trataron muy mal.
Sin embargo, los humanos pensaron que
era un monstruo y lo trataron muy mal.
Tuttavia, gli umani iniziarono a dare del mostro
a quel forziere e a perseguitarlo.
No entanto, os humanos começaram a chamar
o baú do tesouro de monstro e o perseguiram.
Однако сундук с сокровищами люди 
посчитали чудовищем и прогнали.