People can travel through Two-dimensional in Paranormal Tokyo

A 28-year-old youth from the earth society transmigrated into a 16-year-old high school student in the supernatural Tokyo.
In this world, demons appear, and ordinary people know the existence of demons, but there are extraordinary forces to resist them.
As a time traveler, Yuta Ishihara has a Two-dimensional traversal system, which allows him to travel to the Two-dimensional world and become stronger.
The first world "Welcome to the Classroom of Power Supremacy"
The Second World "Demon Slayer"
Relying on the cultivation aptitude and comprehension bonus obtained by crossing the Two-dimensional world, he continued to practice and become stronger, and then created brilliance in the supernatural Tokyo.
Half original supernatural Tokyo text half Two-dimensional travel through the same human...