A father-in-law who desperately wanted a grandson impregnated his beautiful daughter-in-law, resulting in her pregnancy and ejaculation. (Mizukawa Jun, DLDSS-236)

I thought that with my good-for-nothing son marrying the beautiful Miss Run, I'd finally be able to hold my grandson... But my foolish son is so busy that he's neglecting Miss Run. At this rate, I don't know how long it will be before I see my grandson's face. In that case, I'll have to get my wife pregnant...