Nayu shocks her schoolmates on the first day of middle school by wearing black lace panties. She aims to ''spread the word on the merits of underwear'', and help other girls concerned with their development - by opening a underwear club.

Chu-Bra!! (TV) Special Edition: Complete Box Set Episodes:

• 1. The Girl With Adult Panties
  
• 2. Doing Something About These Bulging Bosoms
  
• 3. On a Windy Day
  
• 4. Each Has Her Own Shapes
  
• 5. Between Being an Adult and a Kid
  
• 6. Radical Puberty
  
• 7. Swaying Hearts of Men
  
• 8. Overnight Lodging in Undergarments!
  
• 9. Seventh Grade Summer Vacation
  
• 10. Have Pride With Those Chests
  
• 11. An Afternoon With Her
  
• 12. Before Meeting You...