"Kin-iro Mosaic: Pretty Days" is a 2016 anime OVA that serves as an extension of the "Kin-iro Mosaic" series, continuing the slice-of-life adventures of its main characters. The story revolves around the daily lives of five high school girls: Shinobu Omiya, a Japanese girl with a deep fascination for British culture; Alice Cartelet, a cheerful and energetic British girl who moved to Japan to live with Shinobu; Aya Komichi, Shinobu’s childhood friend who is often shy but kind-hearted; Yoko Inokuma, a lively and athletic girl with a tomboyish personality; and Karen Kujo, Alice’s childhood friend from England who is confident and occasionally mischievous.

The OVA is divided into three distinct segments, each focusing on different aspects of the girls’ lives. The first segment takes place during a school cultural festival, where the group prepares for a play. Shinobu and Alice take on leading roles, while Aya, Yoko, and Karen support them behind the scenes. The segment highlights their teamwork and the humorous mishaps that occur during rehearsals, showcasing their close-knit friendship.

The second segment is set during a summer vacation, where the girls visit a beach. This segment emphasizes their playful and carefree interactions, with moments of lighthearted comedy as they enjoy swimming, building sandcastles, and sharing meals. The dynamics between the characters are further explored, particularly the bond between Shinobu and Alice, whose contrasting personalities often lead to amusing situations.

The third segment takes place during winter, focusing on a Christmas party hosted at Shinobu’s house. The girls exchange gifts, decorate the house, and reflect on their memories together. This segment provides a heartwarming conclusion to the OVA, underscoring the themes of friendship and cultural exchange that are central to the series.

Throughout the OVA, the narrative maintains a light and cheerful tone, with an emphasis on the everyday experiences of the characters. The interactions between the girls are filled with humor and warmth, capturing the essence of their relationships. The OVA also retains the series’ signature blend of Japanese and British cultural elements, particularly through Alice and Karen’s perspectives as foreigners in Japan. "Kin-iro Mosaic: Pretty Days" serves as a nostalgic and enjoyable addition to the series, offering fans a deeper look into the lives of its beloved characters.