Hiromi is the only guy in the class. As an introvert, the school trip on a cruise was something he was not looking forward to. However, after boarding, the ship began to sink causing Hiromi and his classmates to get washed up on a desert island. When he came to, he was greeted by lips of Aria, the most beautiful girl in school, firmly planted onto his own. Moving on, the gravity of the situation dawns on him and the pressing need for hydration becomes paramount. This is when Aria comes up with a brilliant idea for hydration and nutrients... breast milk... and nutrition-dense semen... Oh just what will become of the class?