Citrus, Yagate Kimi ni Naru Recommendations
Yagate Kimi ni Naru is a great Shoujo Ai and contains all the features of a forbidden lesbian relationship in a very conservative Japanese culture. Unlike the forbidden step-sister love of Citrus, Yagate Kimi ni Naru is confined to a first-year high schooler and her Senpai.
I definitely recommend watching both.
Both shows are about 2 girls in high school who develop love for each other along with drama and romance. The 2 main characters are quite different from each other and have difficulties trying to understand each other and the tension can sometimes go high. I think both shows try to show how difficult it can be for 2 young girls to experience this kind of love and everything that goes around it.
Both Shows Feature 2 Young High School Girls trying to find their romance. Both shows have the similar topics.