The anime’s three main cast members have also been revealed.

Kohsuke Tanabe voices Kei:

Fairouz Ai voices Amina:

Shunsuke Takeuchi voices Doujima:

Here’s how Pony Canyon describes it:

Money, women, organs. Kei, a high school boy, frequents the underground mahjong parlor teeming with desires, earning him the moniker ‘K of Ice’ in the underworld due to his cold-hearted strategy and stylish gameplay. Rumors also circulate that he keeps a girl at his home.

Via Crunchyroll News