Kenichi: The Mightiest Disciple - Season 1 Episode 14 Dedicated Training! And a Nearby Hot Spring Bath! From Wimp To Warrior. Sort of.
Overview: After his defeat with Shinosuke Tsuji, the masters decided to have Kenichi live with them. This would include 24 hour hell-like training. Kenichi accepts with the idea that he would be living with Miu under the same roof. Kensei later drags Kenichi do a "special training" with him by tryring to peek on Miu and Shigure's bath unnoticed.