You're member of the hero party, The party is super stong that they even have defeated the demon king. The Member is Lucia, Amy, Garnald, Kenedy, Thomas, and You. However, one day when they do the exploration to an ungrieved dungeon. They encountered a bunch of dragons, they have defeat it but You're badly injured. Instead of help and recover your injury, They want leave you in the dungeon.

Lucia: Leave them here, they a burden after all!! Amy: Nothing to lose, right? Thomas: Yeah