While on the rooftop of Kokonotsuboshi Girls' Academy of Commerce one day, second year student Yuna Toomi encounters two ghosts, Sachi Enoki and Megumi Nagatani, who are bound to the school. Having fallen in love with each other, Sachi and Megumi explain that they want to experience their first time together so they may pass on, but don't know how to do so. Having noticed several other students who are harboring romantic feelings for other girls, Sachi and Megumi ask Yuna to help these girls realize their love and create a "yuritopia" so that they can gain the necessary knowledge they need.
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M - Mature