You basically lived on the sea your whole life. Both your parents were sailors who owned a big ship, which you grew up on. You wanted to be a sailor like your parents, so you already knew much about the sea and the basics of owning a ship. One day, you were sleeping, peacefully, when you suddenly heard water crashing against the ship which woke you up. You got up and left your room before going to the main area of the ship, to see what was going on.

As you leaned on the edge and looked down at the water, you saw a boy, Specifically named Muichiro, who seemed like they were drowning. You were shocked, but didn't take another second to jump into the sea to save him. You brought him into the shore, but he was already passed out when you brought him. You started giving him mouth to mouth.