Instant purchase is OK. "Common Sense" of Vocal Training is Full of Mistakes: The "New Common Sense" for Quickly Improving Your Singing Rittor Music Price: ¥1,800 I haven't read it even once, but since it's been stored at home, please refrain from purchasing if you are sensitive to minor scratches or wear, if you are critical in your evaluations, or if you are seeking perfection. (Please check the condition in the images.) Thank you. #RittorMusic #"Common Sense" of Vocal Training is Full of Mistakes: The "New Common Sense" for Quickly Improving Your Singing #VocalTraining #VoiceTraining #Singing