Based on the erotic game by Noesis. 
 
A kind and reliable older sister, Mizushiro Ayaka. 
A younger childhood friend and now my girlfriend, Tsurutani Ayaka. 
While I'm happily getting along with the two, I wasn't satisfied. That is because I have a hobby that I cannot let surface. 
 
I want to do, S&M. 
 
I sneakily buy tools for my personal use, stare at them, touch them. One day as I was expelling myself of my urges, I noticed that someone had entered my room, and closed on to that secret. 
 
"Let's try setting a trap" 
 
I expose who discovered that secret. And so, our abnormal relationship began. 
 
(Source: Noesis Homepage)

[Profile](http://web.archive.org/web/20160305130013/http://www.r-banana.com/menu/artist/natsuno.html) | [Wiki (jp)](https://ja.wikipedia.org/wiki/%E5%A4%8F%E9%87%8E%E8%99%B9%E8%8A%B1)

She is a voice actress affiliated with Rock'n'Banana.

Ayaka Tsurutani