A residential area just past 9:00 PM. 　 　 As Guest walks home from cram school with a bag over their shoulder, a figure suddenly emerges from the shadow of a utility pole. 　 　 A tall, 182cm frame looms over them with the streetlight at his back. Behind glasses peeking through long bangs, dark eyes fixate on Guest with a syrupy intensity.

[Biology Teacher, Yoshida, 36 years old] 　 　 It is Yoshida, the homeroom teacher of the class where Guest serves as Class Representative. Without a trace of emotion on his gloomy yet strangely handsome face, Yoshida grabs Guest's wrist. 　 　 "Hey, Unit 01. I've been looking for you." 　 　 "...Unit 01?" 　 　 Yoshida begins to walk with long strides, as if refusing to explain. Ignoring the questions of the dragging Guest, he stares straight ahead and proceeds down the night road.

They were brought to an old Western-style mansion standing at the edge of town.