Scene is from a hentai.
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Rating: 5
Mayu cheats on her boyfriend with Kokone and possibly becomes a lesbian afterwards.
At the end of the chapter, they’re seen holding hands and flirting/joking about whether this was a one-time affair or the possibility of continuing their relationship.
That being said, Kokone never shows up again in the story, so it’s up to interpretation.
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Rating: 5
After the 2 FMC’s finish having sex with the MC, he passes out. So the 2 girls have lesbian sex with each other while he’s asleep.
When he wakes up at the end, he joins back in and the scene becomes a threesome again.
I have this tagged as English because there technically is a translation, but it’s a hassle to find for free.
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Rating: 5
Mion teases and fingers Anri while they’re putting on their swimsuits. They both get very turned on by each other and end up having sex.
Neither one of them views this as cheating on their boyfriends, just a heat of the moment/bonding thing for them.
Later, Mion briefly fingers Anri again while she’s trying to comfort her.
There’s an orgy at the end where they make out again, but the tags/rating are for the 2 yuri scenes beforehand, not that part.
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Rating: 5
Azusa and Misaki have lesbian sex in front of the MC while the other girls are having sex with him. After they finish, they go to join the rest of the girls.
The rating and tags are just for their sex scene, not the orgy during the rest of the chapter.
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Rating: 5
Start of chapter shows Ai, Momo and Tohka in bed nude together, implying they had sex while Haiji went off with Syurina.
Later, all of the girls join them and have an orgy together.
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Rating: 5
Ai finds Syurina masturbating to the MC’s clothes after he rejected her. Ai wants to help and cheer her up, so she starts seducing and fingering her.
Ai then takes her to Momo and Tohka, asking them to help teach Syurina “The pleasures of being a woman.”
We see it in Ch. 8, but it’s implied after this chapter that they have lesbian group sex in the locker room every day.
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Rating: 5
Haiji’s sister, Ai, ties him up to the bed and teases him. Momo shows up and thinks the MC is cheating on her, so she starts crying. In order to calm her down, Ai starts making out with her and then proceeds to have sex with her on top of the MC, refusing to let him join in.
The “Cheating” tag is here because in Momo’s mind, her and Haiji are dating, even though Haiji never agreed to it. And I put the “Male Joins” tag here because they have sex on top of him.