Well, this was pretty different from what I usually see from this circle. Netori, instead of the usual netorase or even netorare. I wonder how many of these they made? Though I think this is still the only one of its ilk that was translated...
That said. Pft. Did they seriously try to make the blackmailing asshole sympathetic? Seriously? The guy's a complete asshole no matter how tragic his backstory is... and I don't think his and Iroha's story will have that much of a happy ending in the long run. Not that they had very good options with how her parents were acting... but that's the kind of subject that likely shouldn't be discussed in depth in this place of all places.
Still, pretty hot scenes. Iroha's fall to the D was pretty entertaining. Her boyfriend wasn't a complete loser, mostly, and avoided most of the typical NTR cliches.
If anything, I'd say this was better written than this circle's usual fare, which surprised me.