Uta∽Kata: Shotou no Futanatsu
Shotou no Futanatsu ／ Twin Summers of the First Winter ／ Uta Kata Episode 13 ／ Uta Kata Special ／ Uta Kata Special OVA ／ Uta Kata: Shotou no Futa Natsu ／ Uta Kata: Shotō no Futa Natsu ／ Uta Kata: Summer Pair of Early Winter ／ Utakata: Shotou no Futanatsu ／ Utakata: Summer Pair of Early Winter ／ Uta∽Kata ／ うた∽かた - 初冬の双夏 ／ うた∽かた 初冬の双夏
Description
It's now winter in Kamakura. When Satsuki tells her friends that she'd seen Manatsu, Ichika at first doesn't believe it. But on the day before her 15th birthday, Manatsu's mirror fragment inside Ichika's desk drawer mysteriously disappears. That evening, a young girl calling herself "Mafuyu, Manatsu's identical twin" appears before Ichika with a mischievous smirk on her face. (Source: AniDB)