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 must keep hidden.

I want to do S&M.

I secretly buy tools for my personal use - stare at it, touch it. And then one day as I was expelling myself of my urges, I noticed that someone had entered my room and saw the secret.

Let's try setting a trap...

I turn to see who discovered my secret. And so, our abnormal relationship began.

(This OVA is based on the erotic game by Noesis.)

一个善良而可靠的姐姐，水城绫香。一个年轻的童年朋友，现在是我的女朋友，鹤谷绫香。虽然我和这两个人相处得很愉快，但我并不满足。那是因为我有一个必须隐藏起来的爱好。

我想做S&M。

我秘密地购买工具供我个人使用--盯着它，摸着它。然后有一天，当我正在驱逐自己的冲动时，我发现有人进入我的房间，看到了这个秘密。

让我们试着设置一个陷阱......

我转身去看谁发现了我的秘密。就这样，我们不正常的关系开始了。

Che parte da una scena S e M alias Sadista e Masochista, una donna a cui piace essere trattata in un S & M e chiedere di continuare a farlo.

속으로만 SM을 동경하던 누나 '미즈시로 아야카'는 남동생에 이끌려 하게된다. 한편, '미즈시로 아야카' 역시 SM을 즐기는 남자친구 '미즈시로 요시토'에게 맞춰주기로 하는데...