When Shiho Nishina got worried about her sex life with her husband, her husband proposed to her, "Why don't we go to a couple exchange party?" At first Shiho strongly turned down the idea, but eventually, she gave in because her husband was very persuasive. "We're just going to observe, okay?" Shiho said as she reluctantly agreed to it. Meanwhile, a former diplomat Mr. Kubozuka ran a couple exchange club, "Aquarium," with his wife in their house. At first, Shiho was being very cautious, but gradually, she got attracted to Mr. and Mrs. Kubozuka's charm and finally agreed to exchange couples with them. It seemed that their sex problem had disappeard and they had found happiness, but as it turned out, that was just the beginning of their nightmare...
Aiko had left her career behind to focus on her family and was living what seemed to be a happy married life. However, she discovers that her husband, Seiichi, who works for a prestigious company, has been having an affair. Believing that he would eventually return to her, Aiko endures the pain and continues their marriage. But then she uncovers a shocking truth, one even more devastating than the betrayal of infidelity itself.
After becoming pregnant, Aiko resolves to raise the child on her own. Determined to focus solely on her own happiness and that of her child, she begins to take control of her future. Meanwhile, Seiichi comes to realize both the depth of his love for Aiko and the foolishness of his actions. Hoping for a second chance, he struggles to make amends and rebuild what was lost.
After becoming pregnant, Aiko resolves to raise the child on her own. Determined to focus solely on her own happiness and that of her child, she begins to take control of her future. Meanwhile, Seiichi comes to realize both the depth of his love for Aiko and the foolishness of his actions. Hoping for a second chance, he struggles to make amends and rebuild what was lost.
Onuma Mihono works at a travel agency. After breaking up with her boyfriend of six years, someone she had been thinking about marriage with, she realizes she is already 30.
Then, a man transfers into Mihono’s company. It is Ureshino Eisei, the “accomplice” with whom, despite both of them having lovers at the time, she had a physical relationship 10 years ago. Mihono is shaken when Eisei speaks to her with a cool expression, but she resolves to treat him normally. However, when they are alone together, Eisei whispers in the same sweet voice as back then.
“Don’t you feel like we’re destined?”
The pleasure and desire that revive with their reunion. And yet, even after 10 years, she still cannot grasp his true feelings. Am I the one he truly loves? Or am I just for fun? Even as adults, unable to break free, she sinks deeper into a secret relationship.
Then, a man transfers into Mihono’s company. It is Ureshino Eisei, the “accomplice” with whom, despite both of them having lovers at the time, she had a physical relationship 10 years ago. Mihono is shaken when Eisei speaks to her with a cool expression, but she resolves to treat him normally. However, when they are alone together, Eisei whispers in the same sweet voice as back then.
“Don’t you feel like we’re destined?”
The pleasure and desire that revive with their reunion. And yet, even after 10 years, she still cannot grasp his true feelings. Am I the one he truly loves? Or am I just for fun? Even as adults, unable to break free, she sinks deeper into a secret relationship.
