Kimi ga Deneb ni Hikaru made

Leika, who loves helping people, and Atori, who adores musicals, are childhood friends. Since they were little, the two of them would put on plays just for each other, with no audience. Leika always thought that Atori's acting was impressive. Leika thought that if Atori loved it so much, she should join the drama club. But Atori wouldn't hear of it, saying, "Leika isn't in the drama club," and "It's enough that Leika watches me." Then, due to certain circumstances, Atori ends up taking the stage.

(Source: Natalie.mu, translated)