Invaders of the Rokujouma!? Collector's Edition 2 (Light Novel)

Contains Volumes 5-7!
There’s a new transfer student in class who appears to be a cosplay friend of Yurika’s, but Yurika won’t stop talking about evil magical girls. Is this the enemy she’s been trying to warn the Corona House crew about all along?
Lately, Koutarou has been growing more and more suspicious of Kiriha. Claiming that she’s come to invade the surface is one thing, but what on earth is she doing helping the neighborhood association clean up the city?
Koutarou has a new part-time job that he seems to be keeping a secret, and Theia is more than ready to get started on the new play. When an old rival reappears dead set on revenge, however, Koutarou may be in for the trip of a lifetime.