aré+Guu is a Japanese anime, based on an original manga which ran in Monthly Shōnen Gangan. Twenty-six TV episodes were made, followed by two OVA sequels: Haré+Guu DELUXE and Haré+Guu FINAL.

The surreal, comical, and occasionally serious series focuses on the story of a 10-year-old jungle boy named Haré and his misadventures with Guu, a liminal being who usually presents herself as a young girl.

Overview from themoviedb.org