12 titles recommended if you like Undefeated Bahamut Chronicle
Date A Live
Hybrid x Heart Magias Academy Ataraxia
Ladies versus Butlers!
Hundred
The Testament of Sister New Devil
The Asterisk War
Bogus Skill «Fruitmaster» ~About that time I became able to eat unlimited numbers of Skill Fruits (that kill you)~
To Love Ru
Kämpfer
Infinite Stratos
The Fruit of Evolution: Before I Knew It, My Life Had It Made
Harem in the Labyrinth of Another World