Astlibra Revision Gaiden: The Cave of Phantom Mist

Summary pulled directly from Steam - Some text may only be applicable to Steam platform

A side story for ASTLIBRA starring a new female protagonist in a 20+ hour adventure!
Take control of the baker's reclusive daughter to challenge randomly generated dungeons in a roguelike-style gameplay loop.
Strengthen your character with various methods of growth. Use all new magic attacks to beat up your enemies and relieve your stress.

Every day she followed the same routine, sweeping away out in front of her family's store.
The shut-in girl could only gaze with longing toward the work done by the town's heroic Guild.
But when the Guild members go missing one day, she has no choice but to throw herself into conflict, chasing after their tracks in order to save her ill little sister.

This is the story of an ordinary girl's battle.