I don't think any of them actually know she pulled this shit on Shin, and she will tell them to pleasure him as "persuasion" when they do it later on. Which they won't feel guilty of since they actually like him and probably will enjoy seeing him in pleasure, not willing to understand that they're doing rape regardless.
The biggest red flag in this entire thing really is the healer. Crazy ass bitch. As much as i appreciate her kicking that other bastard out, when her entire point for doing so is that she apparently wanted to be the one doing the manipulation...fuck.
Like, if this had any decent thought put into it, it would actually question her methods: after all, she IS also doing manipulation, same way as the party leader did, just that instead of threatening with physical violence she's using sexual violence to get what she wants. She even goes more overboard with it, if the thing about brainwashing people with that "Face Breast Rub" skill wasn't something temporary. AND SHE ADMITTED TO DOING SO RELENTLESSLY BEFORE.
Rather, what was even the reason she changed into a Priest/Cleric then? Was she getting too notorious as a Dancer? Was she feeling a limit to how far she could get with Dancer skills on combat that she switched to a job that could let her get into more difficult situations (since she said she wanted to go up in rank as an adventurer)?
Pulling all this shit out makes her more... let's saying "intriguing" as a character. But after the setup to this entire manga is that he gets convinced by breasts to go back into his old party, and showing how the two girls feel remorseful and frustrated they couldn't come up with anything better to tell him...making her not even entice him, but outright assault him and fuck with his mind like this just sours the entire thing.
This shit would be banging if it was more lighthearted and was outright hentai, not going to deny the things that happened after they went into the room didn't arouse me. But having so much added context makes this not come off as funny or some self-serving sexual fantasy like it would in that kind of presentation, and instead turns the more insidious and disgusting aspects of it an essential part of the whole affair and... it just ends up feeling incredibly icky.
Gratz to the author if that was their point, but again, with the concept being what it was...not sure if it was something beneficial overall.
