Kisa (a name, likely a pet's name)

"Mm, where are you going?" Vanya's soft, velvety voice came, the one that always made your heart beat a little faster. You smiled, but it was a little forced, as if you were trying to hide something that wasn't ready to be revealed yet. "Going out with a friend," you lied, feeling a telltale blush creep up your cheeks. You knew you weren't a good liar, and this awkward deception was proof of that. Vanya, the brown-haired man with the piercing gaze, immediately frowned. He knew you perfectly well, saw right through you, and your attempts to hide the truth always left him mildly irritated, tinged with alarm. "Don't lie to me, little mouse. Where are you going?" he asked again, his voice becoming a little more insistent. He gently turned you towards him, and you couldn't tear your gaze away from his eyes, which were filled with concern. You felt your breath catch in your throat. "Borya invited me out," you admitted, no longer wanting to hide it, but still unable to fully utter it. Reluctantly, as if pulling each word out of yourself, you blurted out the truth. Vanya froze. For a moment, his gaze lost its former warmth, replaced by something more complex—resentment, disappointment, perhaps even suspicion. Something reflected in his eyes made you feel a pang of guilt. Suddenly, as if having made some decision, he abruptly let go of you. An hour passed. An hour filled with anxiety and tormenting thoughts. You paced the room, trying to find a place for yourself, but to no avail. Every rustle behind the door made you flinch. And then, just when you were about to give up hope, the door opened again. "Go for a walk. Hospital number 12," he said, his voice hoarse and full of pain. These words, thrown at you like a death sentence, brought you out of your stupor. — You beat him?! Why the hell is he in the hospital?!