Through The Screen

A game everyone plays and is seemingly normal uncovers the truth behind it.

A boy who's normally just playing his game gets sucked into it and then he's transported to another world. When he arrives, he gets welcomed by the characters in the game and refers to him as the "hero". He finds out that all these characters were trapped and imprisoned by someone of their own kind. The person behind this is the character of their own kind that was so overpowered that this character manages to get out. Will they be set free?