Shinpei, Ushioh, and Ryunosuke follow Shide into Heine's homeworld to a final battle to prevent Shide from achieving his desired ending. The summer remote island suspense story comes to an epic conclusion!

Shinpei and the gang need to find the Ushioh from the 9th loop in order to revive her full power. However, Heine has copied Shinpei's memories and now knows how to search for Ushioh as well. Will Shinpei be able to reunite with Ushioh in the end...?

Barely escaping the deadly battle with Heine and Shide, Shinpei is thrown into the 5th loop with the help of Nagumo! The mystery of Hitogashima Island will finally be revealed! But someone in the dark is watching....

Shinpei and Nagamo defeat the shadow "Shiorih", and are awaiting for the shadow "Mioh" to come to them. However, it is the shadow "Ushioh" that appears before Shinpei. Meanwhile, Mioh approaches with murderous intent...

Hearing the news of the passing of his childhood friend Ushio, Shinpei returned to his hometown on the remote island of Hitogashima to attend her funeral. Little does he know that it is the beginning of a summer full of mystery and horror! No one is prepared for the time-twisting adventures ahead that defy life and death!

Shinpei and the gang rushed to save Sou's father and discovered the true identity of Heine and her evil associate. Meanwhile, Nagumo must go all out to defeat the enemy, even if it means she must sacrifice everything she got...!

Through the secret passage under the Hishigata Hospital, Shinpei and the gang arrive at Hiroko's Grotto. There, they found the shadow of Sou and Tokiko's mother strangling her husband. Can Shinpei save Dr. Hishigata and uncover the true intentions of Heine and the deadly Shadows?