If you're looking for manga similar to Shuumatsu Busou Pancake, you might like these titles.
Byu York is the new ambassador for the world's most hated country Arcty. He's come to Meeka Country to build diplomatic relations between their two countries. When he meets the princess of Meeka Country and gets caught in an terrorist attack...
Sakimori, a mysterious boy who can converse with the dead, stands up against a series of skinning serial murders.