Youth Rascal

is a Japanese light novel series written by Hajime Kamoshida and illustrated by Keeji Mizoguchi. ASCII Media Works have published eight volumes since April 2014 under their Dengeki Bunko imprint. A manga adaptation with art by Tsugumi Nanamiya titled has been serialized in ASCII Media Works' seinen manga magazine Dengeki G's Comic since January 2016. An anime adaptation of the manga by CloverWorks will premiere on October 4, 2018. An anime film adaptation titled will premiere in 2019.

Plot
Sakuta Azusagawa's life takes a turn for the unexpected when he meets teenage actress Mai Sakurajima, who wanders into a library dressed in a bunny suit. Mai is intrigued that Sakuta is the only one who can see her, as other people are unable to see her, even when she is dressing normally or attempting to stay away from celebrity life. Calling this phenomenon "Adolescence Syndrome", Sakuta decides to solve this mystery, while continuing to get closer to Mai and meeting other girls who suffer "Adolescence Syndrome" as well.