A Chance Meeting on a Moonlit Night is 130th chapter of manga which flashback show Sota's tragic past and meeting with Shihso
Sano sees Kenshin's injures from Sorjiro while battle as Yumi and Sano watched them. after Kenshin put bandages on his body he ready to fight Sorjiro. Sorjio revealed to Yumi that he had tragic past - as Sorjiro was abused by his father's family after his parents's death and put to smile to survive it. one day he washed his injures he sees a person was killed by a bandaged man who turn out be Shisho.