Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Curious (12)	Interacted with 5 types of side characters.
Delivery Done (15)	Completed the postal round.
Music Connoisseur (15)	(Secret)
Persistently Curious (15)	Interacted with all types of side characters.
Starting the round (10)	Delivered a letter.
Traveler (15)	Visited all areas.