Yuusha-chan no Bouken wa Owatte Shimatta! 2

The heroine, tormented by nightmares of a demon army leader, loses her maxed-out levels due to a curse but clings to the protection of a goddess, vowing not to give up. However, the enemy overwhelms her, breaking her spirit. Demons assault her while the divine blessing endlessly heals her. With a cursed collar, she experiences endless ecstasy at the slightest touch, trapped in a living nightmare of infinite pleasure.