Kimagure Orange Road: Hurricane! Akane the Shapechanging Girl

Kyousuke's cousin Akane, who is also an esper and has the power to transform herself into anybody else, comes over to visit. She quickly becomes friends with Hikaru and believes that Hikaru is Kyousuke's girlfriend. When she sees Kyousuke and Madoka together, Akane's mission to break the two up begins and her powers create many dangerous situations for him.