Compile Heart has released the first full trailer for Death Under the Labyrinth, its upcoming PS Vita dungeon RPG.

The trailer introduces the game’s characters, its Guardian mecha customization system, its turn-based battle system featuring three heroines each with their own Guardians, its 3D dungeons, and more.

The developer also announced the game’s opening and ending themes:

Opening Theme: “Ryuusei no Ribbon” Singer: Kanaha Mori

Lyrics: Midori Ide

Composition: Tenpei Sato Ending Theme: “Starry Night” Singer: Serena Tanaka

Lyrics: Ar†cana

Composition: Tenpei Sato

Death Under the Labyrinth is due out for PS Vita in Japan to December 17.

Watch the trailer below.