All in Abyss: Ikasama Sabaki

Asuha Senahara, a self-proclaimed genius gambler, is a wanderer.
Amidst the tables of cards and dice, it is she alone who snatches the chips at stake.
One day, she learns of the “gambling district”, a special ward where gambling holds influence above all else.
The “Witches” - a group of the most extraordinary gamblers rule over the place - treat Asuha to the taste of defeat; something she was unfamiliar with.
They exercised not luck, not skill, but dirty tricks, such that felled Asuha to the depths of the abyss.
As a self-proclaimed genius gambler, Asuha becomes determined to take down the Witches.
The Coliseum is the battlefield. The challenger is Asuha Senahara. The chips are on the table, and the Witches are ready to be exposed.