Explore the intriguing narrative of 'The Tale of Rejuvenation in the 21st Century,' a web novel set in contemporary Korea. Follow the adventures of a martial arts master facing the complexities of the 21st century, blending action, fantasy, and martial arts genres seamlessly. Delve into a story featuring a male protagonist, intertwined with elements like adaptation to manhwa, unique appearance changes, and the pursuit of cultivation in a modern-day setting.