I Became The Younger Sister Of An S-class Hero.

Embark on a thrilling adventure in the web novel 'I Became The Younger Sister Of An S-class Hero'. Witness the protagonist's journey as they find themselves transformed into the younger sister of a mysterious S-class hero known as the 'Devil King'. Explore a world filled with action, adventure, comedy, drama, ecchi, fantasy, gender bender, harem, psychological elements, school life, and supernatural occurrences.