The scene takes place while the girls involved are taking a shower or bath.
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Rating: 4
While the MC is having sex with Shieri, Rin and Ann briefly join in by groping Shieri.
While they’re sucking on her breasts, 1 of them mentions how they did this all the time in the past, implying they’ve had lesbian threesomes before.
Eventually Rin and Ann stop to just have lesbian sex with each other in the background.
So I’m gonna tag this as Male Involved, but the MC doesn’t do anything with Rin and Ann after they leave to have lesbian sex.
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Rating: 3
Yua gropes and starts to have sex with Himari while they’re taking a bath together.
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Rating: 2
Mikawa walks in on her sister taking a bath and wants to teach her some stuff.
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Rating: 4
Continued from last chapter, Hime is affected by the MC’s charm and starts trying to have sex with him.
Rina then walks in on them and gets affected by the charm as well, so they team up on the MC and grope him.
Near the end, Rina teaches Hime about how to touch a girl and find their “switch,” implying Rina’s been with other women in the past.
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Rating: 4
Ethica hugs and kisses Ryouko in the shower.
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Rating: 4
The chapter starts with a backstory for Nobara that shows that she was always a lesbian and had a harem of girls back in school.
She stole the girl the MC brought over in the past and had sex with her.
After the backstory ends, there’s a brief continuation of the bath scene from last chapter.
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Rating: 1
Chapter Title: Made of Stone
While Mike is asking Naia about how Emily handled taking care of the house, she tells him that they spent many nights alone in the tub.
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Rating: 4
Aoi and Rio are shown having sex in the shower.
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Rating: 5
Yukiko meets a housemother for a dorm and is seduced by and has sex with her while in the bath.
At the end of the chapter, all of the girls in the dorm bust in and are revealed to have been a part of the housemother’s harem. So they all join in and have sex with Yukiko.
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Rating: 4
Senjougahara and Hanekawa take a bath together, where Senjougahara takes the opportunity to tease and play with Hanekawa’s body.
The “Implied Sex” tag is there because at the end, Hanekawa says that she “crossed the line” with her, implying they probably did a little more than groping. But it’s more of just a bonding chapter for these 2, so it was probably just a joke.
This scene is also in the anime and it’s a lot longer/more explicit in showing Senjougahara and Hanekawa playing around.