Cultivate your lands, fight the monsters, and find your soul mate.
Choose the gender of your player character, when Accel and Sonya are transferred to this world, they accidentally ended up in one body, so you can switch between the boy point of view and the girl's point of view in mid-game. Of course, there are lots of eligible bachelors and bachelorettes, how you weave your story, is completely up to you.
No matter what you do, though, be sure to meet Yumil the giant. Ask him to lift islands for you to create farmland. He can also fish out sunken ships from the bottom of the sea for you to conduct treasure hunts in. Sea monsters, too, will make their appearances, let Yumil fight these dragons.