Shonan Junai Gumi is a Japanese manga series created by Toshiki Yui. It was serialized in the magazine Weekly Young Jump from 1990 to 1996. The story follows a group of high school delinquents in the Shonan area, focusing on their friendships, rivalries, and adventures. The series is known for its blend of action, comedy, and drama, capturing the essence of youth culture in Japan. It has gained a cult following and is often recognized for its influence on later works in the delinquent genre, including the popular series Crows and Worst.