Lagrange - The Flower of Rin-ne

On the day of the cultural festival, Lan and Muginami have to keep a mission given to them a secret from Madoka. Whilst looking around the stalls they helped with, the girls come across Asteria who has Madoka escort her around the festival. As Madoka starts to become depressed at the thought of Lan and Muginami making new friends, she learns from Asteria about the assault Lan and Muginami are making and decides to go after them.