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Rating: 3
The MC has a foursome with Eunyung, Mi-Nah and Seo-Hyun.
Succubus System – Chapter 59
Tag: Oral Sex
Scene features a girl performing oral sex on another girl.
Exposure – Chapters 34-36
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Rating: 2
A guy has a threesome with the FMC and another woman.
Married Woman Hunter App – Chapters 15-17
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Rating: 3
The girls very briefly have lesbian sex with each other before having an orgy with the MC.
My Classmate Is My Dad’s Bride, but in Bed She’s Mine. – Chapters 16-17
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Rating: 2
While the MC and Sayaka are having sex, the MC has her start fingering Erika.
Magnetic Pull – Chapters 35-37
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Rating: 5
Mr. Roh allows Ms. Choi have lesbian sex with his wife, Sandra, while he watches.
Since it was consensual, there’s no “Cheating” tag here.
Daydream – Chapter 28
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Rating: 4
Nana gets caught having sex with a guy by a married woman that had been trying to have sex with him for months.
Nana invites her to join them for a threesome, and then the guy asks them to try out lesbian sex.
The married woman claims she tried having sex with a girl while in college, but Nana was more pretty.
The guy watches them for a while, but eventually he joins in again.
Sensual Lessons – Chapters 47-49
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Rating: 4
Ji Yoo and Park A-Seon have lesbian sex with each other before the MC joins them for a threesome.
My Stepmother’s Friends – Chapters 111-118
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Rating: 5
The MC has a foursome with Na-Yeon, Gyeong-Eun, and Yu-Mi.
While the MC is having sex with Yu-Mi, he tells Na-Yeon and Gyeong-Eun to have lesbian sex with each other.
Eventually they join the MC, and Na-Yeon starts having lesbian sex with Yu-Mi when the MC switches to Gyeong-Eun.
There’s a few instances of the MC imagining them having lesbian sex, but they’re very brief, that’s why the tag is here.