I Heard I'm Just a Key

My name is Chen Mo, and I'm in a panic right now. A woman suddenly appeared and wanted to open the door to a new world for me. It was not about letters and numbers, nor was it about practicing true knowledge. Su Yan: "Chen Mo, you are the key, the one used to open the door. Come with me." Chen Mo: "???" Where's the promised protagonist? Where's the promised cool and dazzling guy? Little brother, what's going on?