This chapter introduces Luka, who after being saved by Rin in the game they play together, falls in love with her.
Luka then invites Rin and the MC over to her place, where she spikes both of their drinks to make them pass out.
Luka then rapes and has lesbian sex with Rin in front of the MC while he’s tied-up, stating that he doesn’t deserve her and she’s going to steal her away.
Eventually Luka also has sex with the MC, but then she goes back to Rin.
In an alternate ending to Episode 4, Echidna goes all the way with raping Aldra into full on lesbian sex. The episode ends with Aldra’s husband walking in on them.
Apparently in the novel, Aldra’s husband is written in 2nd person perspective. So the implication is that by breaking the 4th wall, the reader is supposed to be Aldra’s husband. That’s why Aldra’s husband is shown through 1st person in this OVA, because it’s supposed to look like Echidna is cucking us as the viewer.
Koharu gets seduced and has sex with a male and female masseuse while the MC is passed out next to them.
The 2 workers do not have their names given, but the female one is very intimate with Koharu throughout the “massage.”
At one point, the female masseuse strips and rubs her body against Koharu’s while kissing her neck, causing Koharu to get very turned on and seemingly questioning her own sexuality.
There is colored versions and a few extra pages of art from this scene in this gallery.