Tokyo Ghoul, created by Sui Ishida, is a dark and gripping seinen manga series that explores the life of Ken Kaneki, a college student who becomes a half-ghoul after a fateful encounter. Ghouls are supernatural creatures that feed on human flesh, and Kaneki must navigate the dangerous world of ghouls while struggling with his own identity. With its compelling story, intense action, and deep exploration of themes like identity and morality, Tokyo Ghoul has gained a massive following among seinen manga fans.