Run! This Is Way Too Over-the-Top

All kinds of amusing things happen to a pair of senior brother and sister disciples on their travels after coming down from the mountain.

Right after they descend the mountain, they encounter a woman who has been snatched away by a monster to be its bride. What else can they do but step in and help? But the woman is as beautiful as a celestial being, and through a twist of fate, she ends up traveling with them on their training journey.

The heroine has amnesia early on. She's cold-hearted inside and only puts on an act on the outside. She's the villain!