This is a work by Akira Okazaki. My Younger Brothers are Sorry, volumes 1-12 set. Volumes 6, 8, 9, and 11 come with store-specific bonuses. I am selling these to organize my collection. Please refrain from purchasing if you are overly concerned about the condition, as these have been stored by a private individual. Shipping will generally be on Saturdays or Sundays.