OVA
Description
Kōko Matsumoto (松本 香子), whose name signifies "fragrant child" with a surname meaning "pine tree origin," is a young woman distinguished by long brown hair, dark brown eyes, and frequent attire of a white striped T-shirt under a pink top. She attended high school with Miyako Hoshino, sharing a club where Miyako scarcely recalls their interactions. During this period, Kōko cultivated an obsessive fixation, later manifesting as stalking behavior while insisting Miyako remains her "best friend."
Generally pleasant and approachable, Kōko smiles readily and assists strangers. Yet any mention of Miyako triggers an intense, unsettling shift in her demeanor, marked by threatening speech and actions. This stems from her long-term surveillance: tracking Miyako’s routines, walking routes past Miyako’s haunts or home-viewing spots, and resenting rain for obstructing observation.
Her stalking surfaces when she silently approaches Miyako napping at university, causing alarm. After Hana Shirosaki nearly contacts police upon suspecting her, Kōko pretends to leave but hides behind a tree. She claims exhaustive knowledge of Miyako’s habits and preferences, asserting she understands Miyako better than Miyako herself.
Their relationship evolves as Kōko repeatedly aids Miyako—crafting perfectly fitted costumes without measurements, mirroring Miyako’s own gestures toward Hana—and gradually earns trust. By Valentine’s Day, Miyako begins using Kōko’s first name, signaling closeness.
Kōko has a younger sister, Yuna Matsumoto, with whom she enjoys walks and caring for Yuna’s pet dog, named "Miyako" after Miyako Hoshino; the dog features in Kōko’s LINE profile picture. She befriends Miyako’s family, calling Miyako’s mother, Chizuru Hoshino, "mom" after entering their home under friendship pretenses. Chizuru trusts her to care for Miyako. Kōko bonds with Miyako’s sister, Hinata, over shared admiration; Hinata uses no honorifics, indicating familiarity. Initially wary, Noa Himesaka later contacts Kōko for Miyako-related information after Kōko helps find Noa’s lost puppy and sister.
In *Precious Friends*, Kōko appears post-credits, excitedly gushing over a photo of Miyako during a trip. Her hobbies include walks linked to Miyako’s locations and compiling trivia notes. She appears in every episode before her formal introduction in Episode 6, sporting a hairstyle inspired by Miyako’s high school look.
Generally pleasant and approachable, Kōko smiles readily and assists strangers. Yet any mention of Miyako triggers an intense, unsettling shift in her demeanor, marked by threatening speech and actions. This stems from her long-term surveillance: tracking Miyako’s routines, walking routes past Miyako’s haunts or home-viewing spots, and resenting rain for obstructing observation.
Her stalking surfaces when she silently approaches Miyako napping at university, causing alarm. After Hana Shirosaki nearly contacts police upon suspecting her, Kōko pretends to leave but hides behind a tree. She claims exhaustive knowledge of Miyako’s habits and preferences, asserting she understands Miyako better than Miyako herself.
Their relationship evolves as Kōko repeatedly aids Miyako—crafting perfectly fitted costumes without measurements, mirroring Miyako’s own gestures toward Hana—and gradually earns trust. By Valentine’s Day, Miyako begins using Kōko’s first name, signaling closeness.
Kōko has a younger sister, Yuna Matsumoto, with whom she enjoys walks and caring for Yuna’s pet dog, named "Miyako" after Miyako Hoshino; the dog features in Kōko’s LINE profile picture. She befriends Miyako’s family, calling Miyako’s mother, Chizuru Hoshino, "mom" after entering their home under friendship pretenses. Chizuru trusts her to care for Miyako. Kōko bonds with Miyako’s sister, Hinata, over shared admiration; Hinata uses no honorifics, indicating familiarity. Initially wary, Noa Himesaka later contacts Kōko for Miyako-related information after Kōko helps find Noa’s lost puppy and sister.
In *Precious Friends*, Kōko appears post-credits, excitedly gushing over a photo of Miyako during a trip. Her hobbies include walks linked to Miyako’s locations and compiling trivia notes. She appears in every episode before her formal introduction in Episode 6, sporting a hairstyle inspired by Miyako’s high school look.