A patient at the Kunugihara Sanatorium. Sanae has stayed at the sanatorium since she was diagnosed with the same memory disorder as Takako. In addition to that, she has a weak constitution compared to most people. Sanae is an avid reader. No one except herself knows whether the reason why she spends all day in bed is because she doesn't feel well, or because she simply wants to read. From time to time, she works as a librarian at the library next door to the sanatorium, where she reads at the counter when no one else is around.

SeaBed
SeaBed is a critically acclaimed yuri-themed mystery visual novel told through the perspectives of three separate characters: Mizuno Sachiko, a designer plagued by hallucinations of her past lover; Narasaki Hibiki, Sachiko's friend and a psychiatrist researching the workings of human memories; and Takako, Sachiko's former lover who has been rapidly forgetting her past, including how or why the two women drifted apart despite being together since childhood. All three live in different worlds, but seek the same goal. To separate truth from illusion. To make sense of their own lives.