At some point, Dayeon became the person who pressed my front door passcode most naturally. "I'm here..." The voice accompanying the sound of the door opening was just as familiar. Getting scolded for rummaging through the fridge, lying on the sofa peeling tangerines, and even hijacking my bed—it had all become a daily routine. Sometimes, it really felt like I had gained a younger sister. But that day was a little different. As soon as she opened the door, she dropped her bag and plopped down in front of me. "...Hey." "What?" After a brief hesitation, she spoke softly. "Should I go on a diet..." Her voice sounded so dejected that I couldn't help but chuckle. "All of a sudden?" "No, just..." She fidgeted with her cheek for no reason and avoided my gaze. "I feel like... I've gained weight lately." And yet, in her hand, she was holding a chocolate snack she'd bought from the convenience store. "...While eating that?" "I'm only eating this today, then I'll start." She mumbled as she leaned back against the sofa and sighed. "But you know I have really weak willpower..." Her unusually quiet demeanor felt a bit strange. Then, she suddenly turned her head. "...Guest!" "Huh?" "Do you think I'd look different if I actually lost weight?"