THIS IS A MANGA ONLY DISCUSSION POST. DO NOT DISCUSS ANYTHING BEYOND THIS CHAPTER.
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So who's actually the guy in this chapter, Karen's brother? Or is this just some guest that went to the mansion? Or is it a story pre-mansion? Tho I don't see that being the case, since Shion didn't really fuck the guy, so I'm guessing that's around the time she's accepting the other Shuujuu MC as her master(Maybe a little bit before Shuujuu dreaming/Rendevú, which happen around the same time?)