Did isayama create AOT junior high?

Did isayama create AOT junior high?

Titan Junior High School) is a 2015 anime series based on the manga of the same name and a spin-off of the original manga by Hajime Isayama.

Is Eren a titan in AOT junior high?

Eren accidentally runs into the Titan part of Titan Junior High, and tries to find his class 1-4. There, he is attacked by the dropping of giant stationery and notices that it belongs to a Titan. Everyone scrambles out of the classroom and are luckily found by Hannes.