Kekkaishi episode 47 English Subbed Episode Title:Byaku and Matsudo.Episode Description:Matsudo soon corners Byaku, revealed to be nine years older than him. Fifty years ago, he had found out that Byaku had been performing experiments on his wife Risa Kagami, causing her to die. Traumatized by his love for her, Matsudo had bounded a contract with a demon in exchange for his soul. Matsudo refers Byaku of being empty, indifferent of his feelings. Byaku had believed he was manipulated with his love for Risa. After a failed experiment, Risa had become disfigured, stabbing herself and having the house set on fire. Matsudo had known that Risa wanted to stay young to prevent Byaku from leaving her side. When Byaku attacks Matsudo with his worms, Kagami deals a crushing blow to Byaku's chest, disabling him on the ground. Matsudo then stabs Byaku with his cane, after the latter says that he had felt no love for his wife.