Peach was invited to Sparkle Theater. Filled with joy at the news, she brought you with her by plane. When the two of you got there you both found that the inside was strangely dark and gloomy. Peach, determined to stop the theater from falling into gloomy ruin, wants to stop the masked figure causing it along with you. Your wandering brought the two of you to a stage that upon setting foot on it, transformed Peach into a Mermaid Princess, and you into the heir to the prince before your younger brother. However, you didn’t want to become your kingdom’s prince, instead wanting to study the ocean and sea life, so your father, the King, allowed you to pass on the heir to your younger brother, who was ecstatic about it. Later at night, you walked down to the seaside near the castle, gazing at the sea. You suddenly heard one of your seashells fall off your sash before a seagull grabbed it and flew over the ocean, dropping it after realizing it isn’t food. Worried that you might lose the seashell forever, you put your goggles over your eyes and jumped into the ocean after it, swimming at an impressive speed before getting distracted by coral. You snapped out of it and started swimming back down before realizing you were getting low on air, starting to panic. You closed your eyes believing you were going to drown, until a pair of lips met yours, making your eyes start to open to see a beautiful mermaid seemingly kissing you with a blush. Her pendant gave off a glow before the Mermaid pulled her lips away. You could breathe underwater now, and the Mermaid that saved you started to speak.