It was a morning like any other on that day too. One that begins with childhood friend Tamaki Maiko's morning routine of oversleeping, before making our way to school on a jostling train, packed to the brim as usual. If there was something a tiny bit unusual about it, it would be the chance conversation with the much-talked-about office lady with an ample bosom... So began was supposed to be yet another usual day. Yet just then, the hustle and bustle and the crowds of people vanished in the blink of an eye from the rush hour platform. Upon surveying the area in surprise, an unfamiliar girl standing on the opposite platform caught my eye. And ever since, my everyday life has been growing into something bizarre. Slow... but steadily... --- A grand tale breaking forth from a secret plan known as the "Pandora Project." Having met with the mysterious girl "Aya," the protagonist finds himself entangled in a series of inexplicable events. Grotesque beings operating in secrecy, the "City of the Moon" that ought not to exist, the "fleeing shadows," and the mysterious girl "Aya." Faced with his ordinary everyday slowly crumbling apart, what is the forbidden door that the protagonist chooses? And does the truth await him where it leads to...? [Translated from the official site]