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.)
Series Page
Video Link (Rule34 Video)
Anime Version: Episode 15
Length: Long
Stays Yuri: Male Joins + Male Watches
Rating: 5
In the Original version of the story, Rin helps out the MC with Saber’s mana transfer by having lesbian sex with her while he watches.
Eventually the MC joins in and turns the scene into a threesome.
Series Page
Rating: 2
Anna tries to fight back against the Succubus when she shows up in her office, but is beaten and stripped by her instead.
Eventually the MC comes in to rescue her.
Series Page
Raw Chapter Link (Pages 139-156)
Rating: 4
Mio and Tsumire briefly make out with each other in front of the MC before he joins them for a threesome.
Series Page
Video Link (Rule34 Video)
Length: Long
Stays Yuri: Male Joins + Male Watches
Rating: 4
The MC uses hypnosis again to make Karen, Nanami and Miu have lesbian sex with each other while he watches.
Eventually they finish and join the MC for a foursome. (I cut off the video once the foursome began because nothing really yuri happens during it.)
Series Page
Video Link (Reddit)
Length:Â Long
Stays Yuri:Â Male Joins + Male Watches
Rating: 4
Naphissa briefly has lesbian sex with Gretel in front of the MC before he eventually joins them for a threesome.
Series Page
Length:Â Long
Stays Yuri:Â Male Joins + Male Watches
Rating: 5
In one of the endings of the game, Kaori and Kyouko will have lesbian sex with each other in front of the MC.
Eventually the MC will join in as well, turning it into a threesome.
Series Page
Length: Long
Stays Yuri: Male Joins + Male Watches
Rating: 5
Going on at the same time as Scene 4, all of the catgirls who were watching get horny and begin having lesbian sex with each other.
Eventually they join in with the MC, Shigure and Fraise for an orgy.
Series Page
Length: Long
Stays Yuri: Male Joins + Male Watches
Rating: 3
Shigure and Fraise have lesbian sex with each other in front of everybody before the MC eventually joins them for a threesome.
At the same time as this, all of the other catgirls get horny from watching them and begin having lesbian sex with each other, which I listed as a Separate Scene.
Series Page
Length: Long
Stays Yuri: Male Joins + Male Watches
Rating: 3
Vanilla gropes and teases Azuki in front of the MC before he eventually joins them for a threesome.
Series Page
Length: Long
Stays Yuri: Male Joins + Male Watches
Rating: 3
Vanilla briefly has lesbian sex with Chocola in front of the MC before he eventually joins them for a threesome.