Commercial Academy for Kokonotsuboshi girls school built on the site of an old castle, has the nickname "Shirojo". One day shy Toom Yuen, who lived a quiet life here, suddenly finds two ghosts on the roof during lunch.
Enoki Sasha, who died in an accident before the war, and Nagatani Megumi, who died from the disease 30 years ago. These two "soul mates" were killed with unshared feelings in their hearts, and he met, fell in love with each other. They are eager to experience their "first time" together in front of their eternal rest.
... But they do not know how.
Two that are tied to the site on which stands the Academy, recruited Yong, so that she has helped them to create more "yuri" pair in the academy, so they can learn at least some sexual performance by observing them and help girls who are struggling with their hidden feelings.
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