Here's a summary of the game, via Idea Factory: 

About

The rotation of the celestial bodies has ceased, and it's up to you to make your way through the four tower mazes and set things in motion again in this challenging dungeon-crawling RPG! Your heroines will be joined in battle by giant mechanical Guardians, whose individual parts can be customized in multiple ways to suit your battle style against a multitude of elemental enemies!

Key Features

• Labyrinths of Possibility! Navigate challenging maps and puzzles in this first-person dungeon-crawler!
• You're a Women, I'm a Machine! Pair your 3-person party with three different Guardians for a turn-based, dungeon-crawling battle system!
• Advanced Robotics! Unique Guardian robots can be customized even further with different parts and crystals to enhance their abilities!
• Elemental Enemies! Strategize attacks between your humans and Guardians and find the crack in your foe's armor exploiting their elemental weakness! 

MeiQ: Labyrinth of Death was first released in Japan on Dec 17th, 2015.
Check out the game's official website here.