I purchased this about a year ago while studying abroad in Canada to stock up. You can decide the curl shape yourself, and it probably depends on the method and hair type, but in my case, it lasted quite well! It may not suit everyone depending on their constitution, but please do so at your own risk. The instructions are in English, so if you want to check them in Japanese, I recommend using AI or a translation app! Please note that we cannot accept returns or exchanges as this is a consumable item. Thank you for your consideration.