Blue Butterfly Fish

Swimming in the ocean freediver Hayama Ushio and an old friend named Sara enjoy the splendours of the deep sea, when Sara bumps into a whale losing her breathing mask. Luckily Ushio can breathe under water, and has the power to control it to some degree, thus saving his careless female friend. In doing so, he notices another girl, swimming freely in these watery depths. Could she have the same spe...