Loser + Isekai + Cheat ability = Harem

The world is submerged, and sea monsters rule the earth.Will Bota and his family ever make it to safety, and escape this aquatic hell?...And who in the world is Kana?!

Only one survivor made it out alive from the school kidnapping incident that rocked the nation... Gito Kang. And now he wants revenge. Let the hunt begin.