Kagerou no Tsuji (2007)

Overview

Sakazaki Iwane is a ronin who spends idle days in Edo. Until a few months ago, he was a promising son and successor to a powerful family in Bungo. He has came back to Edo, where he lived for a while for swordplay training with his two best friends, after a tragedy in the three's home domain⁠—⁠both of the two friends died, one of them killed by Iwane by command of the domain lord's chief retainer. Iwane left his home for Edo, leaving behind his fiancée, a sister of the friend he killed. Eventually, Iwane detects the conspiracy behind the deaths of the two friends and struggles to reform his domain.