Much has been said about how Japan supposedly loves incest or whatever but
non-H works about straight-up incestuous romances like this and this
other manga that came to mind are surprisingly few, despite such allegations. Most of it is just incest-baiting or NBR inseki (step/in-law). Few are brave enough to actually play it straight with a story like this.
Setting aside the obvious fact that this is incest romance, contrary to what I was expecting this was actually incredibly wholesome and cute. I'm guessing this non-H doujin is gonna have an H sequel based on that afterword from the author.
Page 44: should be consummated instead of consumed