Uma de Ari, Shika de Aru.

[Prequel to "Not Black, Not White" (Kuro De Naku, Shiro De Nai)] Yuka Matsuno has been fascinated with Risa Yoshioka ever since their high school days. She graduated with the regret of not having had the opportunity to get to know her better. Now, at 25 years old, they meet again as colleagues, and Yuka gets another chance.