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?!
the treasure chest continued to roam 
around places it held fond memories of.
واصل صندوق الكنز التجوال في الأماكن
التي احتوت ذكريات عزيزة له
el Cofre siguió vagando por todos los
lugares donde tenía bonitos recuerdos.
el Cofre siguió vagando por todos los
lugares donde tenía bonitos recuerdos.
dans ce monde
en repensant au bon vieux temps
il forziere continuò a girovagare
nei luoghi di cui conservava dei bei ricordi.
o baú do tesouro continuou a vagar por
lugares dos quais guardava boas lembranças.
сундук путешествовал по местам,