Nao counts herself as the 68th girl to fall in love with Fujikura-kun, the most popular boy in school. When she found out that Fujikura is sick of all the unwanted attention, she offers herself up as a "fake girlfriend" to help him stave off other girls. He agreed, only because she told him "I don't like Fujikura-kun anyway." Now to stay by his side, Nao has to hide her feelings for him. And as they grow closer from spending time together, the guilty feeling only gets worse. A warm but slightly bitter school love story.
A quiet, moonless night. Tsukishiro Michiru has a dream of being lost inside a mysterious old castle. She meets with five jewels that had taken the form of attractive men. She is ordered by the castle's master. "Choose the jewel you think suits you the best by the night of the next full moon". However, the jewels only have exceedingly harsh personalities that would be called "cruel", "beastly", "sadistic", "scheming", or "yandere"! As though being guided by something, in the real world she then meets five men that look the same as the jewels she met in the dream world. But completely different from the jewels, these men are refreshing and wonderful. Are they the same person or a different person? If they are the same person, which one is their true self? While spending the day with the gentle and refreshing men and the nights with the extreme and ill-mannered men, the curtain is opening on days filled with a puzzling "gap"!