Actual plots, as in, stories that are so good, if you took out the porn, they would make great manga series. There are actually quite a lot of these doujins, and whittling it down as much as I could to make it little more than TL;DR left me with 14 that I could show off. These are the sort of doujins you could enjoy as more than a fap session. The stories are good, the characters are interesting, and their adventures would fit in any normal manga if you took out the porn. Heck, many popular mangaka got their start in hentai. That said, enjoy the list and tell us if there are any titles you would have added in the comments below.

Dick Training Quest ~Little Hero's Conception Journey~
Happy Halloween
It is Suzuki-P's best-known work. Despite that fact that it features other Vocaloids, it is marked as a Luka original song. This tragic story is narrated by Lane and Lean Len and Rin respectively. A young woman, Lucca Luka and a prince, Cougar Gackpo fell in love. A witch hunter named Michelle Miku who sees the couple together grows jealous, as she has harbored her love for Cougar for a long time.
Advanced Filtering
December 19, OK, you're off the hook, mine was in the 70's too, but I hadn't been to CA by then. In addition to your religious leaders, there are counselors who specialize in interfaith couples. Not in endless discussions of temple marriage, not ever. A Mormon will tearfully and emotionally recite whichever lesson they need at the given moment. Thank you, Liz, for your very kind words and encouragement. Sure it's lonely and hard work being a "single parent". As time has gone by I realized that the opinons of others is not important to me and oddly enough those who did not originally approve have had their hearts and minds changed by the love my husband shows me, our daughter, and the members of my family.
It requires a special kind of patience, and I think that the phrase "absence makes the heart grow fonder" has to be something you can relate to. Think of every possible scenario you can think of. If she can't put you before her religion then you need to walk away.