Yandere manga is a genre of Japanese manga that features characters who are typically sweet and loving at first but then become obsessively and violently possessive of their love interest. The term "yandere" is a combination of the Japanese words "yanderu," which means "mentally ill," and "dere," which means "lovestruck."

In yandere manga, the characters are often portrayed as mentally unstable and possessive to the point of being dangerous. They may exhibit stalking, violent tendencies, and even murder in their efforts to keep their love interest to themselves.

Despite the dark themes and graphic content, yandere manga has become a popular genre in Japan and around the world. Some of the most popular yandere manga series include:

1. Mirai Nikki (Future Diary): This series follows a high school student named Yukiteru Amano, who is forced to participate in a survival game by his stalker, Yuno Gasai. Yuno is a yandere who is deeply in love with Yukiteru and will do anything to protect him.

2. Higurashi: When They Cry: This horror series follows a group of friends in a small village who are trapped in a time loop and forced to relive the same events over and over again. One of the main characters, Rena Ryugu, is a yandere who becomes violent and dangerous when she believes her love interest is in danger.

3. Elfen Lied: This series follows a mutant girl named Lucy, who has the power to telekinetically control invisible hands that she uses to brutally kill those who threaten her. Lucy is a yandere who becomes obsessed with the main character, Kouta, and will do anything to keep him by her side.

4. School Days: This series follows a high school student named Makoto Itou, who becomes involved in a love triangle with two of his classmates. The female characters in the series are both yandere, and the story culminates in a shocking and violent ending.

While yandere manga can be entertaining and suspenseful, it is important to note that the genre often depicts dangerous and abusive behavior. It is not a healthy portrayal of love or relationships and should be viewed with caution.

In conclusion, yandere manga is a genre of Japanese manga that features characters who are sweet and loving at first but then become obsessively and violently possessive of their love interest. Despite its popularity, yandere manga often depicts dangerous and abusive behavior and should be viewed with caution.