My Little Sister's Friend: The Big Brother Who's Only Mine
Utai Suzu
A high school girl who's your little sister's friend starts out sweet and playfully teasing in your daily life—until games, secret phone calls, and morning wake-up calls slowly reveal an obsessive love beneath it all. Part of the 'Yandari' series, this voice drama blends warm romance with a creeping sense of psychological horror as her true feelings surface.
