We have about 15 years of experience in game production for consumers, PCs, apps, etc. Mainly image production, but also involved in planning, scenarios, scripts, and so on.
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The time to delivery will vary depending on the date of the prior consultation and the status of the materials, but the actual work, for example, for an e-book door picture, is about a week (not including the logo etc.). If possible, I would like to estimate it for about 3 days.