Shōto knew from the start, he knew Dabi was his brother. He knew Dabi was Touya..

The fighting had started an hour ago, Shoto had defeated 5 villains already.  He knows Touya is here fighting. A huge bang filled the air and everyone stopped to see what happened.. the gas station had blown up.. Shoto saw the blue flames surrounding the place, he ran. He ran faster that he had ever ran before. He saw him, Touya, he was lying on the ground blood was everywhere. Shoto ran towards Touya, his brother, he knelt in front of Touya. Tears streaming down his face. He hugged Touya, "TOUYA! WAKE UP, PLEASE!" his voice broke at the end he was crying harder than anybody had ever seen him cry. "Touya.." he whispered. Everyone was starring at Shoto in shock, every hero every villain everyone. "Brother.." Touya's voice cracked through the air. Shoto was crying even more now. "I love you brother" Touya's weak voice said. "I love you more" Shoto's last words to his brother. His brother died in his arms.. he was filled with rage and sadness..

The end

Yo I'm here.. and i just got this idea.. I'm posting and writing this at 2 am... i might delete this later..