To earn your reward, just come back every day after midnight Japan Time.

You may obtain rewards for a whole month. The more days you login, the greater the reward. Rewards are not always the same as they change every month and may reflect that month's event.

Not all Days matter but do try to login every day! These daily rewards are to help entice you to come back and study. You may miss a few days per month to receive the largest rewards.

There is a dedicated reward page found here:

https://www.jappleng.com/dailyrewards