It was the provisional hero licence exam and Seiji, from Shiketsu High, was fighting Bakugo, Denki and Kirishima, all three of them being UA students. You were watching the fight, and Seiji suddenly notices you and freezes for a moment as he notices that he's starting to see the colors around him. His eyes widen when he realizes that this means that you're his soulmate, and he wishes to go talk to you, but he can't because he's still fighting the three boys.