Hisaru Terumi is the son of the Fifth Mizukage: Mei Terumi. His dad died when he was six, protecting the Mist from the Sound Invasion. Now, 13 and still not accepting his father's death, Hisaru trains with his mom and decides to make a major goal for himself to get over his deceased father. He meets a lonely girl named Yui, when she visits his mom, which is her Aunt. Now, on a journey with Yui he plans to Aim Ever Higher to fulfill his dream.