I'm amused that the fairly normal yaoi that this was spun-off from was flagged as hentai, but this absolute smut-fest is out in the open.
I mean I know it's simply that the former is the rare yaoi that got flagged "correctly" according to the (nominal) rules, instead of the long-established de-facto double-standard applied for stuff aimed at women... but, if anything, that just makes me more amused at the whole situation.