Three sisters get trapped in a world where mahjong tiles are actual currency, which means every hand they play has real stakes. The premise is absurd enough that it commits fully to it, a mahjong rabbit overlord isn't a joke, it's the final boss. What makes this work is that the OVA doesn't wink at the camera; it treats a ridiculous high-concept setup with the same narrative weight as a genuine fantasy adventure. You're watching people solve the mystery of their imprisonment one tile combination at a time. The ecchi framing undercuts nothing, it's just there, the way it was in 1990. This is what happens when someone decides to make a mahjong adventure story seriously, and then doesn't apologize for any of it.
Three sisters find themselves stranded in a bizarre alternate dimension where mahjong tiles function as actual currency. To escape back home, Kasumi, Miki, and Shouko must navigate this strange world's rules and customs, all while honing their competitive instincts for the ultimate confrontation ahead. Standing between them and salvation is an unlikely obstacle: a mahjong-obsessed rabbit who has seized control of this realm and refuses to let anyone leave without proving their worth at the table. What begins as a simple plan to challenge the creature spirals into increasingly absurd encounters that test not just their gaming skills but their teamwork and resolve. The story balances comedic chaos with genuine stakes as the sisters leverage their existing bond and mahjong knowledge to outmaneuver opponents both ridiculous and formidable. Expect rapid-fire humor, fantastical worldbuilding, and plenty of fanservice sprinkled throughout. This OVA appeals to viewers who enjoy lighthearted adventures grounded in unexpected premises, competitive gaming sequences played for laughs, and the kind of self-aware silliness that doesn't take itself too seriously.