How do you get mail in a bottle harvest moon cute?

In "Harvest Moon: Cute," you can receive mail in a bottle by throwing a message in a bottle into the ocean. To do this, you need to have a message in a bottle in your inventory, which you can obtain by participating in the Beach Day festival. Once you have the message in a bottle, simply throw it into the ocean by equipping it in your hands and pressing the action button while standing near the water's edge.