Wind Whistle in Field Demon Sword Matsudaira Tadateru cutting the world

Tadateru Matsudaira the sixth son of Ieyasu Tokugawa was exiled for not taking part in the attack on Osaka Castle 10 years before his exile expired he was attacked in a clandestine Yagyu operation believed to have been ordered by his older brother Hidetada In order to correct his brothers true intentions Tadateru broke the law and went all the way from Hida Province where he was exiled to Edo Castle However the Yagyu do not stop trying to kill Tadateru