ENG DUB * SUMMER TIME RENDER VOL.1-25 END

STORY :

Since the death of his parents, Shinpei Ajiro had lived with the Kofune family and their two daughters—Mio and Ushio. Although he then left his home island to continue his education in Tokyo, Shinpei returns after Ushio tragically drowns during the attempted rescue of a little girl. During the funeral, his best friend informs him about bruises found around Ushio's neck, casting doubt over the cause of her death.
Suspecting a murder has taken place, Shinpei reevaluates recent events, but strange incidents only continue to transpire. Disappearing people and other unexplainable occurrences lead Mio to recall an old folktale referring to entities called "Shadows," which may not be entirely fantasy. Supposedly, an encounter with one's Shadow foretells the person's impending demise.
Facing the dark side of Hitogashima Island, Shinpei stands against his grim fate to fulfill Ushio's final will—to protect Mio.    

故事發生在建立於日都島（日都ヶ島）的小鎮之上，男主角網代慎平由於青梅竹馬小舟潮的逝世而重回故地，卻捲入了牽涉到日都島一個古老傳說的重大事變中，並開始嘗試和同伴們一道阻止即將到來的災禍。
故事發生地的原型為友島（友ヶ島），位於紀淡海峽，與淡路島隔海相望，現實中是無人島群，直到二戰結束前都是軍事要地，禁止一般人進入，頗具神秘色彩。