Akumade Taida na Akuyaku Kizoku @COMIC

Luke is the languid second son of a villainous duke. By some unexpected instance, he comes to know of his own fate and in an attempt to avoid his own fate he works hard at finding a peaceful family to marry into and researching magic. All his hard work is to live a peaceful and slothful life… And yet he gets involved in one pain to deal with after the other!? The road to laziness is a steep one!