In a small town where "water (Mizu)", and "tea (Cha)" are its sole lifeblood, the conflict between a major tea plantation, and the "opposition" who claims the tea industry is polluting the water, continues to grow.

There resides Mizuno, whose father leads the "opposition", and Chayama, a girl bullied by her classmates for being the sole daughter of the tea plantation. Backgrounds barring them from even talking, they rendezvous behind closed curtains…

Alternate summary:
||Mizuno, a high school girl in an isolated province. While worrying about her father's mayoral election campaign, she also has to keep up with her studies and socializing. But she has a secret she can never reveal to anyone: at a given time, at a given place, she meets with another girl. When they meet, they tease each other, and yet she remains Mizuno's beloved.||