At the start of the chapter, Malida began to have sex with the MC, Irena and Lichere a lot more off-screen as her bloodlust for the upcoming battle also increased her arousal. (This is very inconsequential, so I didn’t tag for this part, I just wanted to mention it.)
After the battle, we are introduced to Liese, which upon finding out she’s basically a tomboy, we get these lines from Malida:
“Albert, a girl, who crossdressed as a guy, might be nice as well. I like girls, but women like Liese are my guilty pleasure. She gets me all riled up. I think it’d be nice to get a taste of her.”
Malida then drags Liese off to the bedroom where they have lesbian sex with each other several times off-screen, but we do hear them moaning.
Eventually, Irena and Lichere join them as well and there’s a short yuri foursome while the MC watches.
This is also the first time any of the girls kiss each other on-screen. It’s possible it has happened off-screen before, but it’s never mentioned.
After a while, the MC joins and remains involved for the rest of the scene