Traveling Through the Parallel World of Fairy Rivers and Lakes

By chance, the male protagonist uses the game he designed as a key to travel to the fairy world in the parallel universe. The male protagonist always thought that he was in his own game, but little did he know that this was a real world similar to his game. Because 90% of the games he designed are close to this parallel world, the game becomes the key to entering the parallel world. There will be a war between the fairy world and the demon clan every ten years. The battle between immortals and demons fifteen years ago was the most brutal, with countless casualties and bones exposed everywhere in both worlds. The world was already in a state of turmoil, and the people were in dire straits. There are still five years and a war that happens once every ten years. Can the male protagonist stop this war? Or go head-on and fight the demons! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.