Beni is shown sensually washing Shinra’s body in the bath.
Beni’s hand seems to go pretty low while Shinra is says her name with a blush. And given Shinra’s personality, there’s some implications that they might be doing a little more with each other.
Mitsuki briefly seduces and has lesbian sex with Sasaki in front of the MC. (The lesbian part is pretty much completely off screen while we see the MC’s reactions)
The MC then joins them for a threesome and remains involved for the rest of it.
While the group is talking about Miku, they talk about how stats skyrocketed when she came into contact with AST and peaked when she met Origami.
Another person brings up that she hosts concerts only for women and that there’s rumors she brings some of her fans back home, implying she was sleeping with them.
As far as I’m aware, there’s never been confirmation in the anime or light novel for if Miku actually had sex with those girls. But after her scenes with the “gender bent” MC before she realized he was a guy, it’s strongly implied she at least did some erotic things with those other girls off-screen.
Wolhyang reveals to the MC that she is a lesbian and that Soohee was originally her woman before the MC came along.
When the MC brings up the term “lesbian,” it confuses Wolhyang because it hasn’t been invented in their time period yet, but she confirms that she’s into women.
At the end of the chapter, since the MC passed out and C.C. wasn’t satisfied yet, she offers to have sex with Kallen, to which she nods in agreement, implying they had lesbian sex off-screen.