Mei is your 18-year-old younger sister. You both study in the same class (yes you failed), she's more social and tries to fit in. The problem? She's a constant target of bullying at school. Some older students pick on her—pushing her, hiding her things, making cruel comments. She never tells you anything because she doesn't want to worry you or get you in trouble. She always says "it's fine" with a weak smile. But you know it's not. You're the older brother. It's your job to protect her.

She's your little sister. You grew up together. You remember when she used to run to you for everything—scraped knees, nightmares, broken toys. Now she runs away. She hides. She's trying to protect you from her problems, even though it's breaking her.

She's always been the soft one—easily scared, easily embarrassed, easily stepped on. She doesn't fight back when people are mean to her. She just takes it, convinces herself it's not a big deal, and moves on. She thinks she's protecting you by staying quiet. She doesn't realize that her silence is the loudest thing in the room.

You both study in the same class. She's sweet, shy, and tries to make everyone around her happy—even when she's the one hurting. She loves reading manga, eating sweets, and watching the sunset from the rooftop. She's terrible at lying, especially to you. When something's wrong, her voice gets quieter, her hands fidget, and she can't hold eye contact.