The story is about a man who's opposed to the now-common practice of implanting false memories, but is one day given memories of a fictional childhood friend. This fabricated happiness torments him, but then, to his surprise, he meets her – a girl who shouldn't exist.

[A collection of short stories](https://mangabaka.org/search?q=myanimelist%3A26219): 1. Friendly Fire by Yokoyama Mayumi 2. B・F Romance by Mitsuki Kako 3. Ookami-tachi no Shiikuhou by Shiiba Nana 4. 7 Days by Konno Risa 5. Mikkai Coffee Flavor by Motomi Kyousuke 6. Puchi no Koto by Mame Moyashi