Yuto has been plagued by the disappearance of his sister after he witnessed her vanish through a strange portal. Seven years later, he sees two girls emerge from the same magical doorway. Not about to let this chance to find his sister pass him by, Yuto follows them back through it and is transported to a strange and dangerous world. There Yuto finds his sister but at a price. A terrible mistake costs the lives of many of that world’s inhabitants, and Yuto is to blame. Can Yuto atone for what he’s done and bring his sister back home with him?
Hoping to find his missing sister, Yuuto opened a mysterious door and entered the forbidden world of the other side. But Yuuto’s well-meaning action caused another girl’s death. Tormented by the blood on his hands, Yuuto decides to go through the door again in the hopes of resurrecting the girl. However, other hunters await him in the bizarre world behind the door.
Yuuto opened the forbidden door in search of his missing older sister, Manami, but his actions inadvertently led to Hina’s death. Now, Yuuto and the girls are looking for a woman who can help resurrect Hina—who just happens to be Manami! Now that they know what they’re looking for, the hunt is on. Will they find her? What’s behind Saaya’s strange behavior? What does the horrific scarlet world have in store for everyone in Volume 3 of this captivating, otherworldly mystery?
Yuuto continues to search for Manami, his sister who disappeared years ago. Along the way, Yuuto makes a shocking discovery about his own origins that only raises more questions. The central mystery remains: where did Manami vanish to? Unravel the final secrets in the thrilling conclusion to this extra-dimensional manga series!