Kenichi: The Mightiest Disciple S01 E11 The Fists of Betrayal! Takeda's Sorrowful Past!

"From Wimp To Warrior. Sort of."

It's the continuation of Kenichi's intense fight with Takeda and Kenichi seems to have the upper hand but his kindness may prove to be his downfall. Kenichi is also wondering what made such a promising boxer like Takeda to become a delinquent.