Scene features at least 1 girl cheating on her significant other with another girl. (The significant other can be their BF, GF, Husband, etc, as long as she’s being unfaithful to them.)
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.
The 2 FMC’s are shown having lesbian sex with each other.
The scene constantly cuts back and forth between the lesbian scene and 1 of the girls having sex with a guy, but because they’re separate scenes happening at different times, I’m still tagging this as No Male.
For context on their relationship, the brown haired FMC is married to the guy we see in the first chapter. The other woman is her daughter-in-law.
Continued from the last scene, Eri and Takamine go to a karaoke place together.
Takamine then proceeds to undress and have Eri grope and 69 her.
To explain why Takamine is doing all of these things to Eri: Takamine is unsure about how the MC feels about her and how a lot of her advances have gone nowhere. She then does everything she’s done to the MC on Eri, so she can get the full picture. So this is supposed to be a demonstration, not Takamine trying to seduce or have sex with Eri.
The entire time however, in Eri’s thoughts, she keeps wanting to go further and do erotic things like lick her breasts and have sex with her.
Eri then screams about how hard it was for her to resist temptations and that there’s no way the MC didn’t feel the same way.
At the end of the chapter, Eri’s girlfriend found out about the whole thing and proceeds to punish her.