[Circle Eden (Diisuke)] Oku-san no Oppai ga Dekasugiru noga Warui! 5 (Touhou Project) [Digital]

Mommy milkers at their finest

@DualGlint007: Sorta. Eirin mentions that her husband can't impregnate anyone because of the medicine she's given him (the one that controls his libido). Her plan is to have her husband shoot his sperm inside Urumi to "weaken" her eggs, so that when Urumi has sex with her own husband (provided she does so within the next day or so), she'll be prepped to conceive. In theory, anyways. The afterword of the book mentions that part 6 will be the finale, so we'll see how that will turn out.

@DualGlint007 I know the context of the story and what he does in the story, but is he supposed to be a reader stand in to allow self insertion?

@boxkomi he suppose to be Eirin's husband, the dude who originally had an erect dysfunction but thanks to Eirin's shady medicine, he now has an everlasting boner. Judging by the story, since Urumi can't get impregnated by whoever NTRs her (as well as her husband), Eirin decides to "allow" her husband to do cheating impregnation sex since he already knocked up Eirin several times, and also knocked up Reisen during her mating season, thus giving Urumi the best chance to have a child since the first story.

Uh, is the protagonist of this series supposed to be a reader insert or naw?