GirlPan vs SeraJuuGirls und Panzer vs. Sailor-fuku to Juusensha; Танкистки против "Пантеры"; ガルパンVSセラ重

Short crossover between two series that Nogami worked on (Girls und Panzer and Sailor-fuku to Juusensha). It's a short one-shot he did during the infamous delay of the Girls und Panzer anime in 2012.