Shōko and her sisters Kasumi and Miki find themselves transported to an alternate dimension where mahjong tiles serve as currency. To return to their original world, Shōko joins forces with Kasumi and Miki to challenge this dimension's ruler, a rabbit skilled at mahjong, as defeating this entity offers their sole chance of escape. The sisters depend on each other to navigate the strange environment and achieve their goal.

Scenes featuring Shōko alongside Kasumi and Miki depict their daily lives, including shared activities like bathing. These moments emphasize the sisters' close bond and their shared experiences adapting to their displaced situation.