12 titles recommended if you like Kämpfer
Hybrid x Heart Magias Academy Ataraxia
The Testament of Sister New Devil
Beast Tamer
Harem in the Labyrinth of Another World
Ladies versus Butlers!
Date A Live
Immoral Guild
Samurai Girls
The Fruit of Evolution: Before I Knew It, My Life Had It Made
Undefeated Bahamut Chronicle
Maken-Ki! Battling Venus
Jack-of-All-Trades, Party of None