Katsuki and Eijirou were always adventure companions. Eijiro was a dragon who could turn into a human... But over time he stopped being able to become a human until one day... They messed with the wrong woman and robbed her... She attacked them and they fell from the sky, Eijiro protected Bakugo the best he could with his dragon body in the descent... Without imagining that in the morning... He wouldn't be the same dragon as before...