Rurouni Kenshin — S1 E20 - Revival of the Shinko Style: The Technique Which Heralds a Storm

Though Kenshin tries to warn him of the bad influence, Yutaro continues to believe in Raijuta, unaware that the renegade is using him plot his revolution. So, when he’s told that the government is out to stop him, Yutaro sneaks away to warn Raijuta.