Ayumu Ototori is a man with a very specific romantic preference: he can only feel genuine attraction toward married women. His ordinary days are spent indulging in this particular taste through adult films. When a sudden earthquake strikes his apartment, a shelf filled with DVDs collapses onto him, and Ayumu is crushed to death. However, instead of oblivion, he awakens to an impossible sight. He has been transported to a fantasy world of swords, sorcery, and adventurers, a realm where magic is real and danger lurks in every dungeon.

The story follows Ayumu as he navigates this new reality, though his twisted desires do not vanish with the change of scenery. The central conflict arises from his obsession and the new opportunities presented by a world filled with heroic men and their devoted partners. The narrative focuses on Ayumu’s interactions with various couples, particularly female adventurers who are already in committed relationships with their comrades. As he explores this world, his actions and the strange circumstances of his arrival drive a bizarre and risqué comedy that explores themes of unconventional longing and the clash between modern perversion and classic fantasy tropes.

The main character, Ayumu Ototori, is defined entirely by his unusual fixation, which serves as the engine for the plot. He is not a traditional hero seeking to defeat a demon lord but rather an antihero whose goals are far more personal and scandalous. The series presents a cast of fantasy archetypes—brave swordsmen, powerful mages, and the women who stand beside them—who become entangled in Ayumu's schemes. As the story progresses, notable narrative arcs likely involve Ayumu inserting himself into adventuring parties, leveraging his knowledge or unique perspective to get close to the heroines, and the resulting fallout from his interference in established relationships. The series is published as a seinen manga, targeting an adult audience with its combination of fantasy elements and mature themes.