Sonny Boy

The third-year middle school student Nagara and his class, along with transfer student Nozomi and the reclusive and enigmatic Mizuho, are abruptly transported to an alternate world in the middle of what seems to be an unending summer day. The group refers to the new dimension as "This World" and discovers that it has its own laws of physics. They eventually discover that they each have magical skills while attempting to return home, but they also struggle to manage their own interpersonal interactions. Due to internal disagreements, the class later divides into two groups. Both groups come across numerous more students who have spent countless years in different "This Worlds" as they travel further on their quest to return home.