>>279755165
>There was a flash forward to MC with a sister wife
>>279754859
>We know MC has sex with one of them
Arata isn't gonna fuck any of his NBR sisters, because that girl doesn't quite look like any of them, and this series is NTR demon lord Miyajima's magnum opus of cuckoldry.
Mark my words: KanoKari, for all the buttblasting it caused, was just the author edging himself in preparation for the devastation this series will cause its readers.
If you want to know the red flag moment: it's in that very same flash-forward you're referencing when Arata muses: 'Who are you holding hands with?'
>>279755361
This is correct, but you need to understand that the entire point of this series is for Arata to fall in love with each of five of his sisters, only to roll over in the end and hand them off for other men to plow, since that is Miyajima's barely-disguised fetish.