The Other Side of Secret Vol. 3 (manga)

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 his captivating, otherwordly mystery?