Koibito wa Oni no Hime

As a young boy, Hayato encountered a princess of the Oni, and together the two made a fateful vow: they would marry once he turned eighteen. From that day forward, however, a strange affliction took hold of him—even the slightest touch from a woman would trigger an embarrassing, risqué mishap, and no one could explain why. Resigned to his fate, Hayato resolved to get through high school without ever pursuing romance, prepared to spend his remaining school years without a girlfriend. But that quiet plan came undone the moment he turned eighteen, when Sakura, the Oni princess he had met so long ago, appeared before him once more—now fully grown and determined to honor the promise of their childhood. What unfolds is the tale of a demon princess and an ordinary high school boy, bound by an old vow and entangled in the mystery of a peculiar cursed charm—one that brings lewd misfortune crashing down on Hayato with every encounter, and whose true nature may shape both of their futures.