Sensuikan ni Koi wo Shita Kujira no Hanashi

I want a girlfriend!" Following this desire, a lonesome sei whale named Dekao falls in love with a submarine at first sight. However, that submarine is in the midst of fighting a war, waiting to launch a ramming attack against an enemy fleet! Depicted by many famous Japanese artists, this is the story of a long, painful period of war that seemed to continue on and on...