even though i do not like it and want to saddle 寝~

I think of friends more than anyone, I think of family “Aya Fujisa Yaka”.
He had a good reputation from everyone, and he was attracted by the goodness of that person, and his boyfriend "Kiwatouji" was also able.

One day, a smooth sailing life without any inconvenience is broken by a mysterious attacker.
"Sayaka" who was abducted suddenly is on the test bench ......and the fact of the shock to know.

you've become a zombie.
"It's not just a zombie.If you don't have sex, your body aches, and if you leave the interval for a week, you die."
"There are individual differences in the type of sex you seek.I want you to figure out for yourself what kind of sex satisfies your thirst."

Fortunately, there is a boyfriend of ”Light Self“ in ”Sayaka".
And the thirst is satisfied with sex with him ......it was supposed to .........................

"It seems that you can not stop aching unless it is a sexual act that deprives another person's partner."

Sexual activity with a person's partner-- that is, “Netori”.
No matter how much you use ”Light Self" as your opponent, you can't feed that sex as a zombie.

In this way, ”Sayaka" is forced to make the ultimate choice whether to prioritize his own life and emotions ......

誰よりも友達思い、家族思いな“彩藤紗夜佳”。
誰からの評判もよく、その人のよさに惹かれて彼氏“木庭燈己”もできた。

そんなある日、なに一つ不自由のない順風満帆な生活は謎の襲撃者によって壊される。
突然拉致された“紗夜佳”は実験台にされ……そして知る衝撃の事実。

『君はゾンビになった』
『ただのゾンビではない。セックスをしなければ体が疼き、一週間間隔を空けると死ぬ』
『求めるセックスの種別は個人差有り。どんなセックスで渇きが満たされるのかは自分で解明してほしい』

幸い“紗夜佳”には、彼氏の“燈己”が居る。
そして彼とのセックスで渇きが満たされる……はずだった……。

『あなたは他人のパートナーを奪う性行為でなければ疼きが止まらないようですね』

人様のパートナーとの性行為――すなわち“寝取り”。
“燈己”をいくら相手にしても、ゾンビとしてそのセックスを養分にはできない。

こうして“紗夜佳”は自分の命と感情のどちらを優先するのか究極の選択を迫られる事になり……。