The Reason is the tenth and the pen-ultimate chapter of Chaos Ignites: Beginning Arc.
The chapter Begins where Chapter 9 left off - Jayna became a witch and Aiko became sad. She asked Kyubey if there is a way to Change her back, but Kyubey said that there is no way back. Aiko had to defeat her own sister and began to cry. Kyubey then tells her why Magical Girls have to suffer. Aiko worries that she will turn into a witch too.
- Magical Girls: