Instructions
Travel to Amoria. Form a party of six characters, all of whom must be married in the game. Your party must include both male and female members. Hunt Indigo Eye and Crystal Boar monsters in the Purplewood forests around Amoria to collect "Lip Lock Keys." Talk to the non-player character Amos in Amoria for an entrance ticket to the Amoria Challenge.
Complete each of the seven stages to beat the party quest. The stages require you to kill monsters (stages one, four, five and six), position party members correctly on ropes (stage two) or spring platforms (stage four) and hunt for monster drops such as Cupid code pieces (stage five). Talk to Amos after every stage to move on.
Continue to the bonus stage known as "Amos' Vault." If your party is not made up of three couples, this will appear after stage six. If your party is three couples, there will be an additional bonus stage that you will be able to complete first. Break the boxes to reveal bonus items, including the Celestial Earrings. You may find other items, as well as the earrings.
Repeat the Amoria Challenge party quest until you find the Celestial Earrings.