Torawareshi Hitomi [English], an hentai doujinshi parodying the Fire Emblem game, by KH
Two Fire Emblem characters, Princess Camilla has sex with prince Takumi in an onsen, behind Camilla’s husband’s back. Good sex (although, out of 31 pictures, not enough were devoted to actual sex in my eyes), well drawn with a pleasant unique feeling and not too much censorship.
I have nothing more to add, for the rest, it’s up to your own sensibility to the art and theme, so, enjoy! ^^
Release credits are for Furseal, Swaztop, Shadedcat, Adam, Q, Danky and Dan, thank you!