[arround 2013][PC/flash games web page] Game about girls figthing zombies

So its a beat em' up game (i say flash bc I played it on web page like y8) is like schoolgirls vs zombies. The 2 first playable characters are a schoolgirl in uniform with a katana, purple long hair and a sunwukong inspired girl orange haired w/ bobcut and monkey tail with a red staff. coop beat em up against zombies with different types but dont remeber right now a lot about them. the girls had gauges with a finisher that did a lot of dmg to a lot of zombies. the katana one was several slices and i think the monkey one transformed. there where locked characters but idk too much about it bc i think it was in japanese

ask me anything else to see if i can remember