User blog comment:B214/Talk About What You Want! 3/@comment-74.110.108.150-20141101133004/@comment-24502975-20141101162208

Jop's guess is most likely. Although, volume 19 is the start of the 3rd year, so maybe said loli decided to move in and join Kuoh Academy.

Using Kunou as a power-source is kinda repetitive as it was already done with Yasaka.