Mai watches over Sayaka from morning until night. To her that is the natural course of each of their days. One day, Sayaka tries to leave Mai's side when she has business in the laboratory.
Episode 5: Big Sister
 الحلقة 5: أخت كبرى
Episode 5: Große Schwester
Episodio 5: Hermana
Episodio 5: Hermana
ÉPISODE 5 : GRANDE SŒUR
Episodio 5: Sorella Maggiore
Episódio 4 - Onee-san
4 серия: Старшая сестра