Miike Naeko of the MPD Transportation Department is concerned about the lack of development in her romantic relationship with Detective Chiba and goes to karaoke with her colleagues Yagi Shiori and Momosaki Toko to sing away her sorrows. While there, Yagi and Momosaki learn that both of them have been followed by someone recently. Momosaki sends off the drunk Naeko and her caretaker Yagi. Once she's alone, a suspicious man begins talking to her.