As a romantic school comedy setting,[1] the story focuses on the budding romantic relationship between Kanade and Yukino Sakurai, twin sisters in their second year at an all-girls high school in Tokyo, and the conflict provided by freshman Sakuya Kamiyama's feelings towards Kanade.

[6] Yukino and Kanade Sakurai, twin sisters and natives from Hokkaido, move together to a student residence in Tokyo to attend high school leaving their younger sister, Shizuku "Shi-chan" alone with their parents.

Sakuya Kamiyama, a first year student, seeks out and stalks Kanade, saying that she's in love with her and will do anything to be with her, she pays Yukino with candies in exchange of photos and personal stuff of her sister.

A single by Nayuta called Bring up Love was released on August 13, 2008,[7] the DVD edition of which contains the first EX episode of the series.

A spin-off manga also by Tōge, titled Candy Boy 〜Young girls fall in love!〜, follows the lives of Sakuya and her classmates behind the scenes of the main story, was distributed on Flapper Mobile alongside the main story release.