I put the novel on hiatus after the amnesia arc started(end of volume 20-23-ongoing), everyone of the cast forgets Haruto/Rio, except Aisha, in the sense that he didn't even exist, because of some damn divine rule. And the author hasn't shown the slightest indication he's ever going to reverse it...
Thankfully the manga is still far from it. Just, what the hell was all this development before for, if it all doesn't mean one iota afterwards?