Monster Girl Doctor Novel Volume 8 features story by Yoshino Origuchi and art by Z-ton.

Glenn returns home for the first time in years, his three fiancées in tow, to inform his estranged father of his pending polygamous marriage. Surprising everyone, the Litbeit patriarch accepts all of Glenn’s non-human partners…save one. It seems the followers of a new religion called the Black Widow Party are wreaking havoc in human lands, and Arahnia is involved! How well does Glenn really know the women he loves? And can he really pull off wedded bliss in triplicate—or must he leave one fiancée behind?