The girls spy on Reika and Kuran having lesbian sex while taking a bath together.
At the end of the episode, it’s revealed that it was just a 3D movie projecting them, but they would’ve had to recorded themselves doing this, so the scene did happen.
Mayu cheats on her boyfriend with Kokone and possibly becomes a lesbian afterwards.
At the end of the chapter, they’re seen holding hands and flirting/joking about whether this was a one-time affair or the possibility of continuing their relationship.
That being said, Kokone never shows up again in the story, so it’s up to interpretation.
Maria watches as Basara has a threesome with Mio and Yuki while they “wash” each other in the bath.
The scene starts with Mio and Yuki showing off their breasts to Basara and pouring shower gel on their breasts. Then, instead of immediately going to him, they begin rubbing their bodies against each other as entertainment for him.
While they’re rubbing against each other, they get very turned on by the situation, so they start getting more intense while also wrapping their legs around one another.
After they finish, Basara becomes involved for the rest of the scene.
Eventually Mio passes out in-between parts, but when she wakes back up, she finds Yuki sucking on her breast, with the scene continuing after Basara joins back in.