Inao Clan was a clan renown for it's kekkei genkai, also knowledge of jutsu, especially fuinjutsu. Inao Clan knowledge and jutsu was feared across the nation, especially their kinjutsu, Crystal Release: The Angel Messenger because it can kill many shinobi when the wing is completed. Because of this, many nation feared this so one of the village, Yumegakure plans an assassination on Inao Clan members. All of the member was killed by 50 Yumegakure ANBU, except Inao Asami who survived the incident.