Buy a "Love Key" for your loved one: Purchase a unique "Love Key" for your partner and receive a special, private number that will stay with you forever. Gift a special key: Choose a key with a unique number that expresses your feelings and send it to your loved one as a symbol of your relationship. This number will remain special to you both for life, symbolizing your deep connection. Update the love stage associated with the key: Track the progress of your relationship by updating the love stage associated with your Love Key.