Reader X 707 The Real After Ending

After finishing playing the game MysticMessenger of 707's route. Who would have thought that this would be the ending is just beginning.

Huh?! What's Saeyoung doing here?! How is that possible?! He's a game character! How did he get here? Or is it me who got there? What is it really?!?

(I do not own the photos and if I spoiled you with the story's ending well....sorry / don't spoil yourself?)