King of Underworld, also known as 저승의 왕은 피곤하다, is a captivating web novel in Korean that delves into the realm of Greek and Roman Mythology. Filled with action, fantasy, and supernatural elements, this story follows the transformation of a protagonist who becomes Hades, the God of the Underworld. As the plot unfolds, readers will encounter a rich tapestry of themes including kingdom building, leadership, and mythical creatures. Through the protagonist's journey, the novel explores complex family relationships, godly powers, and the intricacies of an alternate world where gods and demi-humans coexist. With a diverse range of tags such as reincarnation, magic, and loyalty, King of Underworld offers a thrilling narrative that will enthrall fans of the fantasy genre.