Sonny Boy is an original Japanese anime television series animated by Madhouse and written and directed by Shingo Natsume. The story follows a group of middle school students who are suddenly transported to an alternative dimension where some of them gain supernatural powers. In their quest to find their way home, they unravel the mysteries of this new world, and conflicts between them arise. The series aired from July to October 2021.

Sonny Boy has been noted for its non-traditional storytelling, occasionally skipping over major events and instead focusing on various characters' reactions to those events. While fantasy elements are present, the series primarily uses its setting to explore psychological themes such as identity, social expectation, freedom, and loneliness. The series has been featured in several lists of best anime of its year, and has been praised for the quality of its production and animation and the originality of its visuals.