Episode 1 of *Candy☆Boy* introduces twin sisters Yukino and Kanade Sakurai, who share a dorm room at their high school. The girls enjoy everyday school life alongside their friends and each other. One day, Sakuya Kamiyama, an underclassman, visits Yukino. Meanwhile, Kanade learns from a friend that Sakuya has long admired Yukino. This innocent revelation sets off a chain of events that ultimately leads Yukino to express her feelings for her sister.