Just finished reading through Utawarerumono. There's all sorts of incest in that, although it's not immediately obvious. Looking forward to getting Mask of Deception and Truth on the next Steam sale. Reverse Collapse Mendo and Jefuty would qualify too, I'd say.

>>712626187
>>712627627
My only complaint is that the onsen DLC plot forces you into other girls' routes; there's no option to say no or remain exclusive with your imouto.