This is the song that plays when they're in the limo.

• "Nunun Wheh (Why You)"
  Written by Seung Ho Lee and Jim Kim
  Performed by Chuli and Miae
  Courtesy of Samsung Electronics Co, Ltd
  
  The song when they arive at the tornament in Koga and ar watching all the other ninjas fight.
  
• "Wink"
  Written by Seung Ho Lee and Jim Kim
  Performed by Chuli and Miae
  Courtesy of Samsung Electronics Co, Ltd

When the boys are training with Miyo, her teaching them more Ninjutsu and them teaching her better baseball skills this song is being plaid.