Papillon - Hana to Chou

Ageha and Hana are twins who were separated at birth, with Ageha raised in the countryside by her grandmother and Hana growing up with their parents in the city. When their grandmother fell ill, Ageha moved to live with her family and sister in the city. Now in high school, the twins are very different: Ageha is quiet and unassuming, while Hana is outgoing and popular. One day during a school fair, Ageha is left alone at a booth after her classmates leave for a concert. A boy named Kyuu, wearing a horse mask, hides in the classroom and asks her for coffee. He finds a photo of Ageha and Ryuusei, a childhood friend she has a crush on, and teases her about being his girlfriend. Encouraged by Kyuu, Ageha declares her relationship with Ryuusei, and he unexpectedly appears, recognizing her. As Ageha and Ryuusei reconnect, Hana becomes jealous and begins plotting to take Ryuusei from Ageha.