Blue Submarine No.6 #3: Hearts

Tetsu drifts in the open sea.As his life flashes before him, he begins to black out.But when he comes to, he finds himself resting on the hull of a half-sunken ship.

His savior is one of the enemy.As time passes, he begins to understand them.Meanwhile, Mayumi hasn't given up on him.When the Blue Sub No. 6 finds him, will he be able to prevent more lives from being lost?