My Adopted Twin (shinkirikamibaku) [On hiatus]

Katsuki Bakugou, known for his fiery temper and explosive quirk, might seem like an unlikely candidate for a sibling. However, imagine a twist of fate that brought a new member into his life: an adopted twin. After his father's passing and his mother's descent into abuse, Kitsuki, Katsuki's older sister, made the difficult decision to take her younger brother away. In their new home, a sense of stability began to take root. But their peaceful existence was about to be upended.
One day, Katsuki was waiting for Kitsuki to get home after leaving Japan for 3 days to throw the pro heroes off her back. When she came back, she brought someone with her. She had adopted a kid around his age. The news was both shocking and heartwarming.
How would Katsuki react to having a twin? Would his fiery personality clash with the newcomer's? Or would the unexpected bond of brotherhood soften his rough edges? The possibilities are endless, and the story could explore themes of family, adoption, and the complexities of growing up in a nontraditional household.

Edit: (my friend who was reading this pointed out to me) THE ART USED IN THE BOOK IS NOT MINE!!!! CREDIT TO THE ARTIST SINCE I DON'T KNOW WHO THEY ARE!!!!