Misaki Bakugo. Much older sister to her brother Katsuki has been away in America doing hero work has returned back to Japan after news of her brothers kidnapping. She's been offered a job at the infamous UA high and is working with Shota Aizawa. But what happens when a few causal hook ups turn into something much more things for Misaki will take a huge turn.

All the dragon slayers knew about their mating season. They were either told by their dragon guardians or told by their lacrima... When dragon mating season came around and that dragon had found their true mate they would mark them by biting their mate on the neck. If the bite bled out that person was not their true mate and the wound would heal with no scar left behind. But if the person was their true mate the wound would only bleed a little and heal and leave a scar... If the scars were just normal circles the two mates had a truly strong bond, if one of the scars came out a heart shape and the other a circle the mates had a strong bond and would be in love in their next lifetime and if the scars were both hearts this meant the two were made for each other and would be together forever, in death and life in all lifetimes... this bond was the strongest and it had only ever happened once before...