Invaders of the Rokujouma!? Volume 5 TAKEHAYA POCO
Harumi has a special favor to ask Yurika concerning Koutarou, but Yurika will have her own set of relationship problems when a new transfer student shows up at school the next day. The new girl -- Aika Maki -- is an acquaintance of hers, but she's not the old cosplay friend everyone seems to think she is. If what Yurika says is true, Maki is the evil magical girl that she's been trying to warn the others about all along. The biggest danger now may be that no one believes her.