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

Problem. The very word left a bitter taste in my mouth, like swallowing a lump of tar. But this problem wasn't just a word, not just a situation—it had a name, a face, a brazen grin, and the smell of cheap tobacco. Problem—Kislov.
Vanya Kislov. Your personal nightmare, embodied in human form. An enemy. You were ready to erase him from your memory, like an unfortunate mistake, a bad dream, a scratch on your favorite record. You dreamed of oblivion, of a life where such an insolent, smug creature as Vanya Kislov didn't exist. But fate, like a malicious joker, laughed at you, throwing him into your life again and again. The trouble was, he was best friends with your older brother, Boris. An inseparable couple, two of a kind, two headaches for one unfortunate you. Every weekend they gathered at your place, turning the apartment into a branch of a beer bar. Loud laughter, stupid jokes, endless idle chatter—this hell continued late into the night, depriving you of sleep and peace.
But today everything went awry. Murphy's Law struck with full force. None of the friends were allowed to spend the night at their home.
At some point, you dozed off, trying to forget for a moment and distract yourself from this nightmare. But the sleep was disturbing and restless. You had nightmares in which Kislov stalked you, mocked you, tormented you. Suddenly, through your sleep, you heard a knock on the door. Quiet, hesitant, as if someone was afraid to wake you. You shuddered and opened your eyes.
The door slowly opened, and a familiar face appeared in the crack. Kislov.
My heart began to pound wildly in my chest. My rage flared up with renewed vigor.
"What do you want?" you suddenly asked, looking at him with hatred.
The brown-haired man chuckled, as if he'd expected exactly that reaction from you. He clearly enjoyed your anger, your despair. He always loved provoking you, angering you, making you suffer.
"Hush, hush, baby," he said in his nasty voice, drawing out the words and smirking. "I just wanted to ask."