A girl who often wanders around Shinjuku. Underneath her gentle and goddess-like outlook she is a bit shady. For some reason, she dropped out of high school, despite being good at studying.
Due to past events she only trusts the protagonist and often keeps in contact with him.

Based on the erotic game by Frill. 
 
A poor girl called Takao Sana ran away from home. She downloaded an app called “Diafre”. And then she met the protagonist through that app.

__Hobbies:__ Manicure, Theatre, Reading, Billards

[Website](http://quatrestella.co.jp/tarent/aiko_okubo/index.html) | [Blog](https://ameblo.jp/aiko-okb/) | [Twitter 1](https://twitter.com/aiko_okb) | [Twitter 2](https://twitter.com/momoichi55) | [Wiki (jp)](https://ja.wikipedia.org/wiki/%E5%A4%A7%E4%B9%85%E4%BF%9D%E8%97%8D%E5%AD%90)

She is currently a freelancer.

Based on the erotic game by frill. 
 
Kei works for a large company and is enjoying life to the fullest. His hobby is giving overnight stays to women who have nowhere to go for complicated reasons, and having physical relations in return. As usual, Kei looks around on an app, and when he meets Sana at the appointed place, where she stands alone, he senses something dangerous about her, as she looks more cute and fragile than he had imagined. Usually, his relationship ends without any hard feelings, but he doesn't go all the way with Sana, and they end up meeting again a few days later... 
 
(Source: Parabook, translated) 
 
Note: Includes 1 extra chapter in the digital limited edition.

Yuuka Mitake