Kiri no Naka no Shoujo

Yuuko, a beautiful woman, broke up with her boyfriend Akira and married the son of a confectionery company to make a living and for her family. However, when her only daughter Rika was kidnapped, Yuuko, heartbroken, adopted Natsuko. Natsuko soon grew into a bright and intelligent girl, and Yuuko spent happy days with her. However, before a trip to Hokkaido, a sad and painful memory that happened 12 years ago that she wanted to forget, came back to her.