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: 4
2 girls have lesbian sex with the FMC while the MC watches, but eventually he joins in for most of the rest of the chapter.
At the very end, the MC gets ready to leave and the 3 girls continue to have lesbian sex with each other while he watches.
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Rating: 4
Mari briefly has sex with Kayo in front of her brother before having him join in for a threesome.
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Rating: 4
Misaki catches Rin spying on her having sex with the MC, so Misaki goes to make out with her and seduce her.
Misaki then fingers and teases her as well before having her join them for a threesome.
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Rating: 4
The 2 FMC’s briefly make out with each other in front of the MC before joining him for a threesome.
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Rating: 3
The 1st page of this chapter briefly shows a lesbian couple having sex with each other.
The rest of the chapter is about a guy raping both of them, so I’ll tag this as Male Joins.
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Rating: 4
The 2 FMC’s briefly start to have lesbian sex with each other in front of the MC before he quickly joins them for a threesome.
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Rating: 3
3 girls are hypnotized in the locker room to have sex with each other.
Eventually they spot the MC’s dick, who is hiding in a box, and use it.
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Rating: 3
At the start of the chapter, Misao starts seducing and fingering Midori. She then invites her to have a threesome with the MC.
At the end of the chapter, she tells Midori that she’ll keep teaching her stuff if she backs off from the MC, implying they’ll have sex again without the MC.
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Rating: 4
2 of the FMC’s have lesbian sex in front of the MC before inviting him to join for a threesome.
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Rating: 4
The FMC is forced to have sex with her friend and another guy.
At the end, they threaten to use a taser on the guy to make him go away.