Seinen is a term used in the world of manga and anime to refer to content that is primarily targeted at adult male readers and viewers. This genre of entertainment explores more mature and complex themes, often delving into a wide range of genres including action, drama, romance, horror, and psychological themes. Seinen stories tend to focus on character development, exploring the complexities of human relationships, and delving into deeper philosophical and moral dilemmas. The art style in seinen manga is often more detailed and can be quite graphic at times, depicting violence, sexuality, and mature content. Seinen is a popular and respected genre that offers a more nuanced and layered experience for adult fans of manga and anime.