Nameless ~ the One Thing You Must Recall ~ Initially, it is positioned as a project for a female audience, but in fact there are many aspects that will appeal to everyone. In the center of the plot is a girl named Eri (the user can choose his own), who is a high school student. Everything in her behavior corresponds to what the peers do, with the exception of a hobby. She loves to collect dolls from one manufacturer Kabidol. She treats them as if they were part of her real family, but at the same time, even the closest friends are not known about this. After the death of grandfather, Eri was left completely alone, because parents live behind the ocean. Therefore, the girl began to rely on dolls as her real relatives. And then, at one point, she woke up from strange sounds that came from the kitchen.

The main emphasis on Nameless ~ The One Thing You Must Recall ~ is made on the narrative. Text inserts and dialogs are endowed with visual accompaniment. This can be both scenes involving characters and images of individual locations (House of Herome, School, City Streets and other places). In the beginning, during the introductory part and the presentation of Eri, the story is mainly conducted through the monologue, and in the future other characters appear on the screen. In total, the narrative takes about 40 hours. During this time, the author reveals all key heroes and completes all previously built storylines. In addition, in some situations, history is interrupted by mini-games and other activity.