Dimension High School(2019)

Original title: Dimensionハイスクール

One day, on his way to high school, student Junpei picks up an unusual looking rock. Thinking nothing of it, he heads to class. While in the middle of a session, the rock comes to life and transports him and four others to an animated world! To make matters more interesting, the group is introduced to a giant sphinx who is determined to take over the world! Now, to protect their world from invasion, the group must work together as anime characters and real-world humans!