Entering the World with Middle School Students

A middle school boy, in his prime, is obsessed with his own world, unable to extricate himself, and pretentious. But by chance, he strayed into a parallel world. In this world of jungle and intrigue, where will the protagonist go... Of course, he will continue to play in the second grade and save the world. Ah... If you don't let me go, the world is still waiting for me to save you! ! !