For any scene that has a 4 rating.
Series Page
Raw Chapter Link
Rating: 4
Kikko’s childhood friend, Mikaru, produces steam when she gets embarrassed/turned on that powers up Kikko, so the she flirts with and gropes her a lot to get the steam.
They both are also very turned on by the idea of having sex with each other in general.
Series Page
Chapter Link
Rating: 4
The MC has a threesome with So-Jung and So-Won.
Series Page
Raw Chapter Link
Rating: 4
At the start of the chapter, one of the FMC’s finds a girl passed out and goes to grope and kiss her.
Later, the FMC goes home with her other friend and gets a massage from her that turns into lesbian sex.
Series Page
Raw Chapter Link
Rating: 4
1 of the FMC’s has sex with a spirit girl while the MC watches.
Series Page
Chapter Link
Rating: 4
The MC has a threesome with Sun-Kyung and Ha-Yeon.
Sun-Kyung briefly gets the MC away and just has lesbian sex with Ha-Yeon, but he quickly joins back in.
Series Page
Chapter Link
Rating: 4
The MC has a threesome with In-Na and Sun-Kyung.
Series Page
Raw Chapter Link
Rating: 4
A guy has a threesome with the 2 girls from Ch. 4.
Series Page
Raw Chapter Link
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.
Series Page
Chapter Link (Pages 5-14)
Rating: 4
At the start of the chapter, Miyu and Nina have lesbian sex with each other.
I have this tagged as No Male, but after Page 14, the rest of the chapter is about the MC corrupting them, so be forewarned about that.
Series Page
Raw Chapter Link
Rating: 4
The FMC gets the other 2 girls to join in on her lesbian escapade and have sex for most of the chapter.
At the end of the chapter, they pretty much get the whole school involved with their lesbian sex.