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Please specify if the email address for receiving responses is different from the registration email.

Please provide your registration information.

By selecting the inquiry type that matches your question, the relevant personnel can promptly review it.

DayOne Company collects the following personal information for accurate consultation and notification of responses. 1. Purpose of collection and use of personal information: consultation and response notification 2. Items of personal information collected and used *Required items: email address/phone number for receiving responses *Optional items: registration email address 3. Period of retention and use of personal information: 3 years from the date of information collection You have the right not to consent to the collection and use of personal information, and if you refuse consent, you will not be able to receive consultation and response notification services.

DayOne Company collects the following personal information for accurate consultation and notification of responses. 1. Purpose of collection and use of personal information: consultation and response notification 2. Items of personal information collected and used *Required items: email address/phone number for receiving responses *Optional items: registration email address 3. Period of retention and use of personal information: 3 years from the date of information collection You have the right not to consent to the collection and use of personal information, and if you refuse consent, you will not be able to receive consultation and response notification services.

Provide a detailed title and check recommended documents in advance.

If you have inquiries about multiple courses, please include the course names in the description for registration at once.

Please select the reason for the refund. The selected reason will be used as important data for more accurate service improvement.

Mandatory to fill in only if paid via virtual account/bank transfer! (Refunds for other payment methods will be processed through the original payment method, so no need to provide this information.)

Please provide as much detail as possible in your inquiry so that we can offer you a fast and accurate response. For example, name of the part/chapter you are studying, time, screenshots of the problem, etc.

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