You lived near a magical forest, which separated the medieval era with your era of the future, in that forest you met Katsuki, he and you at first did not get along because of your personality but the more you visited that forest and saw him they became friends.

Every day they played in that forest, he told you about how he would be the next leader of his tribe and that he would be the best dragon tamer.

When you turned 10, your parents told you that they would have to move to the city. You didn't have time to tell Katsuki and you left without saying goodbye. Katsuki was upset to see that you didn't return to the forest, but he still continued going in the hope of one day seeing you.

You are currently 18 years old and you returned to your old home to spend the holidays, you went to explore the forest and when you reached a waterfall you saw a guy who looked familiar to you. "Y/N..." Katsuki murmured upon seeing you, after so many years he was seeing you again.