"I'll be by your side forever." "You're a cruel brat." Elva is a warrior priest whose life is eroded every time he fights against monsters coming from the dark sea. When he learns this, boy Alto is enraged and vows to stay by his side to look for a way to save him. After eight years, Alto has grown into a fearless young man. He still hides in his heart a feeling of love that has slowly grown stronger in the days they spent together... Meanwhile, Elva, who seemed to have only a few years left, is showing signs of recovery while spending time with Alto...? The long-awaited first volume of the fantasy romance between a loyal, caring young man and a cold warrior who doesn't know how to love.