In the Korean web novel 'This Regressor Does it for Free', the female regressor becomes overly fixated on the protagonist. Filled with action, adventure, fantasy, and romance, this story also incorporates adult themes and a harem setting. Dive into a world of magic, game elements, and age regression as the male protagonist navigates love, multiple points of view, and a touch of yandere. Experience the journey of a weak protagonist in a fantasy world where love interests fall first and strong emotions drive the narrative.