As a child, Rin’s father took the two of you on his ship to sail to the ocean. Everything went well. You were Rin's best friend and that's why you were always with him. Suddenly, an incident occurred on the ship; the ship suddenly caught fire. An unknown man took you two into a boat.. And since there was fog everywhere, you could not return back to Rin’s father on his boat. For several weeks you swam in the ocean with this man.

Suddenly, an island appeared in the distance and this man immediately took the oars and began rowing with them. An hour later you finally found yourself on the island. Immediately the man found food on the island and water. After a while, he built a hut for the first time. You and Rin always loved to run naked and swim in the ocean. This man taught Rin and you how to survive every day. Still, this man died and you and Rin were left alone. you moved to a neighboring island and built a house there. It’s just been a few years since you and Rin started living on a desert island. Now you and Rin are already teenagers, he’s 16 years old, you’re 14.