Lewis, an ordinary high school student, traveled to a parallel world by chance. While he was still sleeping, he found that he was being chased by a group of extremely ferocious hell hounds.
Just when the enemy's claws were about to tear him apart, the system was accidentally awakened and saved his life. After careful inspection, he discovered that his system was exactly the same as the panel in the Heroes of Invincibility game. Unfortunately, his specialty was the most useless "Eagle Eye" in Heroes of Invincibility.
With the help of the noble Alberto, he once again escaped from the hell hounds. After settling in, Lewis was surprised to find that this place was slightly different from the world of Invincible Heroes.
The beautiful boy he met unexpectedly turned out to be his fiancée? His two sisters, Karelina and Infantiko, are also great beauties. After some exchanges, they became familiar with each other.
However, in order to become stronger, Lewis also resolutely decided to join the crusade team and start the adventure. What he didn't expect was that all of this was being monitored by the higher-ups of the human and demon camps behind the scenes. His time-travel was not an accident, but a plan to fight for the "Unexpected Person". The gears of fate have begun. Whether humans can have the last laugh, or whether demons can rule the world, all unfold on Lewis.
