Na fronteira de Hokkaido, um veterano de guerra e uma garota Ainu lutam contra rebeldes e militares desertores para achar um tesouro cujo mapa está tatuado em criminosos.

A school appears peaceful from a distance, but a fierce gambling battle takes place once again. Yumeko Jabami is involved in the battle.

Hyakaou Academy is an institute where the academic ranking is based on the pupils' gambling winnings. Yumeko is new to the academy. Her pretty enchantress looks are only surpassed by her voracious appetite to gamble it all and win it all.