Straight to Your Heart
"Straight to Your Heart" is an 
"Around The Island" quest that is unlocked after the player has completed the "Absence Makes the Heart" quest.
Completing the quest unlocks the 
Heart of the Island Mailbox and allows fast-traveling to that area through the map's Fast Travel menu.
Quest Description
"
Cinnamoroll wants to help you heal the Island Spirit."
Quest Information
The player speaks with 
My Melody, who informs the player that Cinnamoroll wants to meet with them as soon as possible. She also tells the player to find Cinnamoroll on Moon Island.
Once the player meets with Cinnamoroll, he tells the player how happy he is that they are helping the 
Island Spirit and about how he did not realize why parts of the island felt sad previously. He wants to make visiting the Island Spirit easier, but has trouble locating the Heart of the Island.
The player will take Cinnamoroll to the Heart of the Island, where he sets up a new Fast-Travel Mailbox and reminds the player to activate it before they leave.
