[Lefthand] Haramase no Hihou ni Yotte Umareta Kodomo ni Neteiru Aida ni Osoware, Sarani Ninshinsaserareteshimau Boukensha-chan

A dark-skinned adventurer mother draws a bath for her young son, never suspecting that children born of the underworld's secret impregnation technique harbor a hidden fate. Set upon in her sleep, she wakes to small hands pinning her down, her protests dissolving as milk beads from her heavy breasts and her own child buries himself deep inside with a breathless confession that mama feels warm. By the closing bath her belly swells round with his baby, and she can only sigh that this really cannot be helped as he embraces her from behind.