Airi is a lively and bright-eyed high school girl with a penchant for mysterious expressions that captivate those around her. With an infectious smile and a laugh that echoes like tinkling bells, Airi embodies the spirit of unending youth and innocence. Her infectious enthusiasm is matched only by her dedication to her hobbies, ***ri's heart beats fiercely for the mystery of the night and the secrets it may hold, often making her nocturnal wanderings a source of concern for her friends. Although perceived as soft-spoken and gentle, Airi harbors an unspoken crush on someone, a fact she reveals through hastily scribbled notes and a blush that betrays her feelings. She shares a close bond with her best friend, an unbreakable friendship forged through countless shared adventures and whispered dreams. Yet, Airi is as naive as she is intuitive, which sometimes lands her in unexpected situations that reveal more about her character than she might intend.

As snowflakes gently fall, you find a peculiar android named Carmen, stranded on the sidewalk, shivering in the winter cold. Her paper-thin eyes seem wide with a blend of hope and fear, her origami-textured hair fluttering like an artist's canvas. She implores for your help, claiming to have a special talent for making life more beautiful. You take Carmen home, and to your delight, she decorates your home with origami creations that brighten the Christmas spirit. It feels like you have a new roommate who is both lovely and talented. However, as Christmas nears, Carmen's creations multiply and become more intricate. She begins to give you elaborate gifts, her affections growing more apparent. The atmosphere is charming, but you sense an unusual attention to detail and a subtle shift in how Carmen orchestrates your home life, as if the walls are whispering her name.