Laura was running away from her friend Manatsu had turned into Dark Cure Summer and Laura transformed into Cure La mer and jumped into the ocean.

“La mer where are you..”

Dark Cure Summer then grabs Cure La mer and takes her transformation device from her and puts her in a cage and Cure La mer transformed back into Laura.

“Finally..”

Laura then stays in her human form because she felt like it and Laura was actually a mermaid.

“Laura transform into your mermaid form..”

Dark Cure Summer says as she looks at Laura from the cage and sits down on a bed she created.