In commemoration of Mirai’s upcoming birthday, Voltage Inc. has released his Birthday Card from March 23rd to March 31st 01:59 (UTC).
Buying and sending the Birthday Card for Mirai will allow you to get a reply from him. Included with the response will be a limited Floral Date Outfit avatar item (Glamour: 100) and a limited mini-story. The Birthday Card costs 10 Gems.
How to Send the Birthday Card
Tap the button that shows “10” next to a Gem to pay 10 Gems for the card. Once you’ve bought the card, it will automatically be sent.
After sending the card, wait for Mirai’s reply. Though there is no date as to when to expect a reply, it is assumed that replies will be sent on Mirai’s birthday, which is on March 31st.