Harmony Island
Source: Yaen

1. Location

2. Island Heart acquisition

  • The Island Heart can be randomly obtained from the reward chests for completing cooperative quests on the island.
  • For the cooperative quests to show up, you must do the yellow quests on the island first.
  • There are 4 cooperative quests in total and as a result 4 reward chests.

2.1. Quest Details

  • The order of the cooperative quests is listed in the image below. The 4th quest requires the song Serenade of Love.

3. Mococo Seeds

Mococo Seed 1 & 2 requires Forest Minuet