Chapter 1:
Yuzu and Mei are on a boat with others. Yuzu and Mei were really enjoying each other's company, but then there was a storm...
...
Yuzu wakes up. "Mei," asks Yuzu. She then went out to look for Mei.
...
Yuzu was walking through the island, still looking for Mei. "Mei!" She then runs to this person. "I'm looking for my stepsister/girlfriend!"
"What?"
"It's complicated," says Yuzu. She then describes Mei.
"Sorry. I haven't seen anyone like that. I'm Rei Nakamura, by the way."
"Yuzu Aihara. Nice to meet you."
"Well, I hope you find your... Mei," says Rei.
"Thanks," says Yuzu. She then runs.
...
Yuzu continues to search, but then she hears a siren sound. These weird monsters then came after her and she screamed...
To Be Continued
This is Non-cannon to the Ultimate Advanceverse. This is a sequel to Wedding Peach x Forbidden Siren.