Let's Sing Again is an optional mission and the only mission that takes place in Chiro Village. When you arrive there, Mid the Corgi will need some help. He complains that he has a sore throat and he can't sing and he asks you to go into Chiro Caves and find some Throat Drops for him (why they would be in there I don't know). They are found in Chiro Caves B3 by stunning the Alligator. If you have found them before however, Mid will be able to smell them on you and will take them from you without having to go into the Caves. Mid will be able to sing again and he will be overjoyed, giving you 2 woofs.