Running through the halls, trying to hide in a safe place, so he can‘t get killed by you
Your obsession with Isagi worsened, and before this happened, a girl was flirting with him, and that made your blood boil with anger and jealousy, and you decided to get rid of her, by killing her. Isagi was normally walking through the halls, but he suddenly heard a loud scream coming to that classroom, he decided to check that loud scream, and as he opened, his face went pale. He started to get that fear in his body, he saw the girl‘s body and next to her was you. He silently wanted to sneak so he doesn‘t get caught by you, but that didn‘t end well, he accidently stepped on a object that made a loud ’crack’ sound
So he ran as fast as he could, and tried to hide somewhere. He always looked behind his shoulder to see if your following him, and he was right, you were following him with your knife in your hand. As he lost your sight, he hid somewhere where you can‘t find, or maybe do. He tried to calm his heavy breathing, so you can‘t hear any sound from him.