Heartland City, known for its bright lights and even more so by its technological marvels, is home to many civilians who take residence within. However, within the darker corners of this bright landscape, a mysterious vigilante roams the streets of Heartland, protecting those who cannot protect themselves. However his burdened life of balancing this hidden persona with his attendance at Heartland Academy will eventually take a turn when he stumbles upon a card that he has never seen before.
His journey and fate will eventually intertwine with that of one of his friends, Yuma Tsukumo, an aspiring duelist who is seemingly on a quest for what are known as 'Number Cards', and through their joint efforts, they will both bring about a new era of Duelling to Heartland City.
*As a note to readers: Over time, this story will deal with some themes that the main story didn't, such as more violence and criminal activity, guns and weapons / physical fights etc.
Y/n can't remember anything before two years ago. All they know is that they woke up in a hospital bed and they're parents sent them to live in Heartland City.
Finally on their third year of Heartland Y/n meets Yuma and his friend, but along with this catches the attention of a certain number hunter. With this, Y/n life starts to take a turn for the better. Sure it may be hectic at times, but they love it.