[Koyama Shigeru] Witch's Failure ~Counterattack Pregnan-sex~ (2D Comic Magazine Mesugaki Haramase Seisai! Wakarase Chakushou de Omedeta Mama Debut Vol. 1) [Rainsong]

A bratty young witch gets a brutal lesson in humility when her attempt to dominate a massive, chained demon backfires spectacularly. As her magic fails and her mind crumbles, the horny beast shatters her tiny body, flooding her womb until her belly swells and she is utterly remade into his broken, blissful little breeding toy. A final squirming panel reveals the puffy, chastened girl declaring "This is the happiest Alma has ever been in her entire life" — a perfect ending to a short, devastating tale of pride, submission, and demonic victory.