 If you liked
Seikai no Monshou
|
 ...then you might like
Katanagatari
|
Both have a main couple with a master/servant relation in which she is the more powerful and smarter player. They constantly tease and banter each other with witty dialog. The romance progresses at similar speed and in a similar way. Both treat difficult ethical questions in subplots, and have some degree of politics and intelligence. Their genre beside the romance is very different (space opera vs. fantasy version of Edo Japan).