Sabikui Bisco, Vol. 7 (light novel) by Shinji Cobkubo
In the town of Imihama, one by one humans are turning into...cats?! Somehow, the Ultrafaith Arrow Bisco and Milo fired at Kurokawa opened a door to another world! Now, its up to them to stop this weird Ly-CAT-thropy epidemic before its too late!