Narumiya, who incurred a debt at a shop, is reverse lesbian raped by female dealer Ruka and forced to repay her debt with her body. However, the remaining debt amounts to as much as 3 million yen, leaving her no choice but to consult her lover Marika. Marika too ends up being lesbian raped by Ruka. On the casino stage, complex human relationships and eroticism intertwine, leading to unexpected developments.