For bug reports and requests, please email us.
taikyokecchaku.support@gmail.com
Please include your device model, iOS version, and which screen the problem happened on.
I bought the full pack but the cases are still locked.
From the title screen go to "Start" → "Buy the full pack" → "Restore purchase". You must be signed in with the same Apple ID you used to buy it.
I changed phones and my progress is gone.
Progress is stored only on the device and does not carry over. Your purchase can be recovered with "Restore purchase".
Can the game replace legal advice?
No. It simplifies the rules for learning. For an individual dispute, contact a consumer affairs centre (188 in Japan) or a professional.
I found a mistake in the content.
Please tell us. A page number or case number from the guideline helps us check quickly.