Kenji, a human wed to an elf named Milfa, grapples with challenges stemming from physiological incompatibilities between their species. Their central conflict arises from anatomical disparities that hinder consummation, driving them to pursue external solutions. Determined to resolve this, Kenji ventures to procure Harpy Ooze—a fabled substance rumored to bridge interspecies unions. His quest leads to capture by harpies, winged creatures infamous for abducting men. Subjected to violation by their princess, Pisda, he is forcibly impregnated. Surviving this trauma, Kenji retrieves the ooze and returns to Milfa.

When initial applications fail, Milfa covertly seeks aid from Dr. Perio, an incubus disguised as a gynecologist. Discovering her absence, Kenji races to intercept, joined by his sorceress grandmother Mitsuko—a practitioner of life-draining magic via intimate acts. Together, they confront Perio, with Mitsuko delivering the fatal blow.

Kenji and Milfa’s bond persists through societal prejudice, anchored by shared resolve to surmount biological limits and external dangers. His arc emphasizes pragmatic problem-solving and protective devotion, with no expanded lore beyond the original two-episode OVA series.