裏切りの寝取らせ ～心まで堕とされてしまった最愛妻・愛依奈

ID: https://vndb.org/v38156
発売日: 25/11/2022
原作: https://vndb.org/v38156
The protagonist, Katagiri Hiroaki, weds Aina, who was only 20 years old at the time. After reaching his forties, Hiroaki is shocked by his diminishing physical and sexual vitality. A visit to the doctor revealed the problem was psychological, and he was advised to seek stimulation regularly. He and his wife tried everything, including watching AV together, but nothing worked.

Soma Shoji, a former subordinate of Hiroaki's with whom he got along well, turns up in his life at some point. He learns that Shoji's sexual appetite was sated after his wife's death through cuckolding play with other couples. The info shakes Hiroaki that someone he knows is involved in such conduct, but he nonetheless shows an interest in learning more. He experiences unexplainable pleasure whenever he and his wife watch a cuckold-themed adult video he has never seen before.

His desire for action leads him to ask Shoji to join him in mock cuckolding activities with Aina. Even though it's just fondling, it excites them to the point where their sexual activities are more passionate than ever. He wants more intense stimulation, so he asks his wife if they can engage in more intimate sexual activities. They did so because they had faith in Shoji, and he was eager to help out—主人公・片桐博隆が妻・片桐愛依奈と結婚をしたのは彼女が当時まだ20歳だった8年前。しかし今、40代になった博隆は体力、精力が衰えたことにショックを受ける。医者に相談したところ原因は精神的なものであり、マンネリ対策で刺激を得る事を推奨された。しかし妻と共にAVを見るなどいろいろ試したが、問題解決には至らなかった。ある日、昔世話をした元部下の相馬彰二と再会し、意気投合。そして彼が妻を亡くした後、とある夫婦の性行為に参加し、寝取られプレイをして性欲を解消していることを聞く。全く縁が無かったそんな行為を身近な知人がしていたことに驚きつつも興味を示し、今まで見ていなかった寝取られAVを妻と見ていると、不思議な興奮に包まれる。そこから次第に現実的行為への興味が膨らんでゆき、性の刺激を得るため、彼に愛依奈を相手にした擬似的な寝取られプレイに参加してもらうことを依頼する。擬似行為は愛撫程度のものだったが、興奮を起こさせることに成功、夫婦の性行為も非常に盛り上がってゆく。その後、より強い刺激を求めたくなり、妻の同意のもと、さらに密接に触れ合う性的行為を依頼してゆくことになる。それは、彰二を信頼してのもので、彼もそれに応えてくれていたが――。"

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