Seinen is a genre of Japanese manga and anime aimed primarily at young adult men, typically aged 18 to 40. It often features more mature themes, complex characters, and intricate storylines compared to shonen, which targets younger male audiences. Seinen works can explore a wide range of topics, including romance, politics, and psychological issues. The art style in seinen can vary significantly, often reflecting the tone of the story. While some seinen series maintain a light-hearted approach, others delve into darker or more philosophical themes. Popular examples of seinen include Berserk, Tokyo Ghoul, and Death Note.