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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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.
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Rating: 4
Rumi and Ranko seduce Rin and start having sex with her.
They then invite the guy from Ch. 7 and it turns into a foursome.
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Rating: 4
Aya visits Mai and the MC for the 1st time in a while. Aya kisses Mai and tries to have sex with her without the MC, but he catches them making out and it turns into a threesome.
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Rating: 4
Aya helps out Mai have sex with the MC. When Aya kisses Mai, Mai admits she liked kissing her more. There’s a lot of yuri action in the threesome.
This is also here because later, Aya and Mai will have lesbian sex without the MC.
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Rating: 4
Ruri spies on Kaname (Ruri’s Aunt) and the MC having sex. Kaname sees her and starts messing groping and making out with her.
The MC eventually joins in and it turns into a threesome.
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Rating: 3
Rion invites her sister Shion to have a threesome with her and the MC.
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Rating: 4
Hina is groped and kissed by Mei and Utsuki, but they are interrupted before they can go any further.
The chapter proceeds into an orgy with the whole student council.
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Rating: 4
The chapter starts with Jun having sex with Utsuki. When they finish, they catch Hina and Mei having sex on the couch. They proceeds to have an orgy together.
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Rating: 4
Hina has lesbian sex with her friend Mei at the request of Sakura-senpai. Mei is very eager and has always wanted to do it with Hina anyways.
Mei makes out with Hina and starts having sex with her, but Sakura eventually joins in and it becomes a threesome.
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Rating: 4
The MC’s sister is a lesbian and she seduces the MC’s girlfriend while he’s not home.
The MC catches them in the act, so his girlfriend proposes having a threesome where whoever can make her feel better, she’ll stay with.