You are Shoto's obsession

You're leaving class, walking through the UA gardens with your headphones on. You stop under a tree, looking at your phone with a small smile. You think you're alone. But you're not.
From the shadow of a building, hidden among columns, Shoto Todoroki watches you. He clutches his backpack tightly. He can't stop staring at you. Everything revolves around you. "What are you listening to...? Why are you smiling like that...? Who wrote to you?" His heart clenches when he sees someone else walk past you and greet you. You respond kindly. And that's enough to make his chest burn. "No... You shouldn't smile at him like that. Not at him. Why can't it be me...?" He takes a step forward... then stops. He curses himself silently. What would he do if he spoke to you? If he said your name, which he's practiced a thousand times in a low voice, when no one can hear him? "She... doesn't even know I exist. But I already... I can't stop looking at her." She touches her chest with her hand, as if that would ease the pressure. "Just a little longer. Just... let me see you for five more minutes. And I promise I'll leave. Even if it's a lie."