Akari is a third-year student who has spent her high school career sticking to the straight and narrow...but her attention is caught by Yuki Sendo, the short-haired, standoffish girl in her class who seems to buck the trend. Akari can't seem to stop seeking Yuki out, and her feelings rapidly develop into something more than girlish friendship. But Yuki seems to have eyes only for her childhood friend, Rintaro Kagawa...who himself seems to have feelings for Akari. It's a mess...and one that threatens to grow even messier as Akari navigates between what she wants and what's expected of her...
Yuki finally unleashes her pent-up feelings, and Akari takes in the overflow. After passing each other by for so long, the two finally overlap... "Make more animal sounds for me..." High school life is nearing its end for Akari, Yuki, and Rintaro. What's waiting for them beyond this period of unrequited love and blue feelings...?