Hitozuma 13-nin inran kurabe (1992)

AKA: 13 Housewife Orgy Party, Hitozuma 13-nin rankô party, Hitozuma maruhi party: 13-nin sukebe kurabe, Tajô tsuma 10-nin shûdan fûfu kôsai, 人妻(秘)パーティー１３人すけべ比べ, 人妻13人と比べ, 13 Married Women Sex Comparison | Directed by Minoru Inao | Country: Japan | Language: Japanese | 55 mins
Cast: : Kyôko Hashimoto, Emi Ishikawa, Akane Koizumi
Subtitles : –

Synopsis (Google Translate)
Sonoyama (Ryuji Yamamoto), an office worker at a computer company, married his subordinate, an office lady, Akiko (Kyoko Hashimoto), three years ago. Akiko was a virgin at the time of their marriage, but thanks to Sonoyama’s training, she has now become completely sexually suited to Sonoyama’s tastes.
Tonight, Akiko is eager to please Sonoyama, but she has recently started using techniques that Sonoyama doesn’t remember teaching her. Although Sonoyama is living a happy life with his wife, he has a mistress at work. Rinko (Koizumi Akane) was hired to fill in for Akiko when she left the company. Rinko is also a greedy type for sex, and one day after having sex with Sonoyama, she suggested that they participate in a swapping party. Driven by curiosity , Sonoyama pretended that Rinko was his wife and participated in the swapping party. Sonoyama and Rinko arrive at the party venue feeling embarrassed. Sonoyama enters the room and is overwhelmed by the atmosphere around him. On the sofa where they sit, Todoroki (Yoshida Masahiro) and Etsuko (Ishikawa Emi), a married couple, are sitting and say that this is their fifth time participating. Todoroki says that women can participate in this party alone, but it seems that men must be accompanied by a partner. In the room, 13 people in total, including the Todoroki couple and themselves, were gathered. There were already lesbian acts happening all over the room. Rinko immediately started having sex with Todoroki. Etsuko also invited Sonoyama. Although Sonoyama felt resistance, he eventually sank into carnal desire. In the end, the 13 people were all mixed up and the party was out of control. In the end, this was the only time Sonoyama participated in a swapping party. It was because he was afraid that he would become addicted to this abnormal pleasure. Then one day , Sonoyama was called by Rinko. “Let’s end our relationship,” she said. Rinko was going to marry Nakamura, a salesman. Sonoyama readily accepted her words, and she felt a little dissatisfied. Sonoyama vows to himself to stop cheating on his wife. While he loves Akiko more than ever, he also reminisces about the various playful encounters he had with Rinko. Just as he vows to be faithful to his wife from now on, a shocking incident occurs that plunges Sonoyama into the depths of anxiety. A couple comes to greet him, saying, “We’ve just moved in next door.” It’s none other than the Todoroki couple. Sonoyama is deeply shaken by their visit. However, he can’t let Akiko know about it. For the time being, he just greets them and gets away with it. Sonoyama returns home after a day’s work. He finds the man’s and woman’s shoes lined up at the entrance. The Todoroki couple have come again. Akiko, unaware of this, is amiably preparing dinner. There is an unusual atmosphere around the three people around the table. Sonoyama has no appetite, but when Todoroki asks, “Are we intruding on you?”, he forces himself on the food and finishes it off. And finally, what Sonoyama had feared became a reality. The next night, Sonoyama got a phone call after returning home from work. The caller was Todoroki. “My wife can’t forget about you and she wants to have sex with me again,” he said. Wanting to somehow settle the situation, Sonoyama lied and said, “I got a sudden call from work,” and hurriedly changed into a suit and ran out of the house. When Sonoyama arrived at the Todoroki house, he said, “I’ll keep what happened that day a secret from my wife. The person who accompanied me that time was my mistress at the time.” “Don’t worry, it’s a common occurrence. How about it, I’ll keep it a secret, so can you hold my wife again? If not…” “Okay, okay!” “Then, take your time. I’ll go for a walk.” Sonoyama and Etsuko were left alone. Sonoyama made up his mind and offered his body to Etsuko. He never thought that a moment of curiosity would turn him into a sex slave. However, if he didn’t satisfy Etsuko, he didn’t know what she would say. Sonoyama had no choice. Todoroki, who was supposed to have gone for a walk, visited Sonoyama’s house without any hesitation. Akiko also welcomed Todoroki. In fact, Akiko was also participating in the swapping party. At that time, she was in Todoroki’s arms. Todoroki smiled lewdly and said, “I wanted to hold you again.” “I understand. Please keep this a secret from my husband.” “I understand. Now…” The same nightmare as the one next door was unfolding at Sonoyama’s house at the same time. Even though Akiko used all her techniques, Todoroki was not able to cum. When Akiko finally led Todoroki to ejaculation, she was completely exhausted. Meanwhile, Sonoyama used all his strength to satisfy Etsuko and returned home staggering. Sonoyama was terrified, thinking, “What if my wife wants me now…” but fortunately his wife was already asleep, tired. What on earth was going to happen to him from now on? With such anxiety in mind, Sonoyama puts a lamp shade on his head and makes a silly face…

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