The scene has references to something yuri that happened or is currently happening, but it isn’t actually shown.
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Rating: 4
Momoka gloats to the MC about all the things she’s done with Sachi even though he’s the one that’s dating her.
We then briefly see what happened off-screen during Ch. 11 & 12.
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Rating: 4
Haine allows Momoka to have sex with Sachi to try and cure her disease.
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Rating: 2
In the review chapter, the author talks about the relationships between Na-Yeon, Yeon-Ah and Soo-Yeon and the reasonings for lesbian sex in the series.
He shows off a diagram of his ideal harem relationship, which is for the girls to be involved with each other as well as the MC. This prompts Yeon-Ah to break the 4th wall, saying that Na-Yeon and Soo-Yeon need to have sex with each other.
So it’s just implied the girls have lesbian sex with each other whenever the MC isn’t around.
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Rating: 4
Mafuyu tells Yoshida that she likes her.
Later, Yoshida tells her the story about how she figured out that she was a lesbian.
At the end of the chapter, Mafuyu makes out with Yoshida and they begin dating.
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Rating: 2
Mafuyu and Sae flirt some more at home, and on 1 page, you can hear them having sex off-screen while the MC is playing a game.
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Rating: 4
The MC has a threesome with 2 of the girls.
Later, 1 of the girls shows that she got a strap-on, so they both run off to have sex with each other without the MC.
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Rating: 4
Cheong takes a drug that causes her to unknowingly have sex with Hye-Jin.
Afterwards, Hye-Jin loved it so much that when she recounts to Cheong what happened, she asks if there’s room for her to be a third in Cheong and Ji-Ho’s relationship.
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Rating: 4
Cheong has Chun-Ja and Hye-Jin have sex with her.
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Rating: 2
Mikawa walks in on her sister taking a bath and wants to teach her some stuff.
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Rating: 2
After Helen saves Sophie from Commander Oh, Helen says that she’s come to an answer about what she wants to do.
The next day, the MC packs up Helen’s car and sees Sophie meeting up to leave with her, implying Helen’s answer was to leave Commander Oh and start dating Sophie.