We Were Trapped...

Kazuki meets with Ghost Collector at her house. Yuna, Kuriko, and Rin follow him into the house. Kazuki talks with the Ghost Collector, named Shino, trying to decide between being a human versus being a ghost. However, the three girls encounter many traps within the house. As Dr. Akai enters the house, he reveals that Shino is his sister. Shino will be watching Kazuki and the girls from now on.