Kokomi Shiina, a girl on the rhythmic gymnastics team, heads to school as usual, tired. During practice, she meets a girl named Chloe Lemaire. Chloe drops a picture as she's leaving and Kokomi knows it had to be important to her, so she goes around the school looking for her, but can't seem to find the girl in question...
Marika-chan, you're like the 
nightingale of Seiou Academy.
Marika-chan, du bist wie die Nachtigall
 der Seiou-Akademie.
Marika-chan, eres como el 
ruiseñor de la Academia Seiou.
Marika-chan, eres como el 
ruiseñor de la Academia Seiou.
Marika, tu es vraiment
l’ange gardien de Seiô.
Marika-chan, sei la Nightingale 
dell'Istituto Seiou.
Marika-chan, você parece a 
Nightingale do Instituto Seiou.