User blog comment:B214/High School DxD EX/@comment-50.139.232.230-20150817033407/@comment-108.224.166.119-20150817163322

I know that in Japan it used to be practiced (I don't know if it still is) is that if a man married into a family of higher social standing he would take their family name. At least I think that was the practice I could be wrong