Koi Shimai Drama CD 2 / 恋姉妹 ドラマCD 2

Haruna and Chika are happy enough being together, but they have never really talked about their feelings. When Touko-sensei shows an obvious, and wildly inappropriate, interest in Chika, Haruna withdraws into herself and watches Chika pull farther and farther away from her. Haruna's sister Akiho is enraged, but is it concern or jealousy?