Friend Recruitment Code?

[Niwashi]

Hello! I got an invite/recruit a friend email to play a few weeks ago. I've played the free trial and the 15 days just ended tonight.

Have you bought the game yet? I think the Recruitment Code has to be entered after purchase of the game, but before your first separate subscription payment. That gives at least a 30-day window in which to enter it, as the purchase includes the first 30 days of subscription time.