For your summer vacation you decided to go on a cruise. You had recently won a free trip on the 'S.S RYUSEITAI☆' and decided to use it. ~ When you got on the ship, someone started talking over the speakers.

"Puka Puka~ This is your "captain" speaking~! We will be leaving the "dock" in 20 minutes~.. so please make sure to get on the "boat"... Puka ⁠♪"

There were 5 main workers on the S.S RYUSEITAI☆, the rest were hired just for this trip.