"I just want to see the sky one more time!" To get his diver's license, Daisuke Senzaki and his friends have been through a lot. In fact, his best friend Kudo passed away during training, which only made Daisuke even more determined to get his license as he entered the final stage to getting his license. Later on, he becomes the first sniper the Coast Guard has had in 46 years. He starts to wonder just what exactly his job is and what that means to him.