S1E19: Tsunan & Nishiki Paintings

Tsunan is seeking to clear his decade-old unresolved regrets surrounding the Sekiho Army. Empathizing with him, Sanosuke joins Tsunan in conspiring an attack on the Home Ministry. However, Kenshin was waiting for them inside the building to stop them. Seeing the former Revolutionary warrior standing in their way, the same way they faced off against Revolutionary warriors when they were in the Sekiho Army, Tsunan's fighting spirit burns. A flurry of explosives are hurled at Kenshin.