Monster, written and illustrated by Naoki Urasawa, is a psychological crime thriller manga that delves into the dark depths of human nature. The story centers around Dr. Kenzo Tenma, a talented surgeon who saves the life of a young boy named Johan Liebert. However, Tenma soon discovers that Johan is a dangerous sociopath responsible for a series of heinous crimes. Determined to stop Johan's reign of terror, Tenma embarks on a relentless pursuit, unraveling a complex web of conspiracy and uncovering the true nature of evil. Monster is a thought-provoking manga that explores the blurred lines between good and evil, and the consequences of one's choices.