If the scene starts as fully yuri, but eventually a male comes in and joins them. (The “Male Involved” tag is only used if the male is involved from the beginning of the scene.)
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Raw Chapter Link
Rating: 4
Emily gropes and starts to have sex with Chika while trying to get her to admit that she’s turned on by the MC.
Chika asks for the MC to help her out, but he gets turned on by the situation and just watches it happen.
After this scene is over, the MC has sex with Emily, so I’ll have this tagged as Male Joins, but he doesn’t interrupt the yuri scene beforehand.
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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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Raw Chapter Link
Rating: 4
Kana meets the MC’s ex, Meiko, and seduces her while the MC is away from home.
It starts with a kiss, but then the scene cuts to them nude in bed, with Meiko’s inner dialogue saying she only went along with it because she hasn’t had sex in a long time.
Based off the clock and the dialogue, it’s implied they only did a little bit off-screen, but Meiko still apologizes to the MC when he walks in.
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Raw Chapter Link
Rating: 4
At the start of the chapter, the 2 nurses are very briefly shown having lesbian sex again in the background.
Later during an orgy, some of the girls have lesbian sex in the background while the MC is having sex with the other ones.
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Rating: 3
While the MC is a threesome, a group of girls are having a lesbian orgy in the background while watching them.
At the end of the chapter, the MC briefly has sex with those girls.
The tags are for the lesbian scene going on in the background, but the focus of the chapter is the threesome.
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Chapter Link
Rating: 4
The chapter starts with Rie and Yuko having lesbian sex with each other again, but Yuko decided to surprise Rie by inviting a guy over.
The rest of the chapter is a threesome.
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Chapter Link
Rating: 3
Susan gropes and fingers Sara in the bath, but eventually the MC joins them and it becomes a threesome.
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Raw Chapter Link
Rating: 2
All of the girls end up accidentally groping and rubbing against each other while playing a game together.
Eventually the MC joins in as well.
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Raw Chapter Links: Ch. 19 – Ch. 20
Rating: 2
Ayumi and Kaho end up rubbing against each other while taking a bath together.
Eventually the MC joins them as well.
Series Page
Raw Chapter Links: Ch. 17 – Ch. 18
Rating: 2
Matsuri gets a full body massage from a female masseuse.
The scene continues for only 1 page in Ch. 18, the rest of it is the MC having sex with Matsuri.