简介：Tokyo has been sunk into the ocean, along with most of the world, during a large-scale land subsidence! Aika Sumeragi is a salvager who works for a small company run by a father and daughter tandem. Alas, the company isn't exactly successful, and money is needed desperately. Thus, Aika accepts the very dangerous job of acquiring an artifact called Lagu for a hefty sum. The boss's daughter Aida Rion joins Aika on this particular mission, and the two set off.
我和班上第二可愛的女生成為朋友/我和班上第二可爱的女生成为朋友/和班上第二可爱的女孩成了朋友/和班上第二可爱的女生成为朋友/和班里第二可爱的女孩子成为了朋友/和班上第二可爱的女孩成为朋友/クラにか/Class de 2 Banme ni Kawaii Onnanoko to Tomodachi ni Natta/I Became Friends with the Second Cutest Girl in My Class/