Narumi (Yurika Nakamura) discovered that Hiiragi (Takajo Inukai), who was supposed to go to the car wash, had the smell of female perfume and long hair in his laundry.Why did Hiirato lie to Narumi and say he went to the car wash?Narumi wants to believe Hiirato, but her instincts always lead in a bad direction.In order to prove that this was just her misunderstanding, Cheng Mei began to look for evidence.She bought bugs and surveillance cameras and installed them in various places in her home, as well as Hiroyot's favorite tie.
On the other hand, Hiiragi noticed that Narumi had begun to doubt him.One day, in the parking lot of his old place again, Hiirato called Mizuki (Nakamura Kaito) and urged him to quickly deal with Narumi.
However, Seong-mi overhears their conversation.After she heard the conversation between Hiiragi and Mizuki, all the previous doubts were connected together, which shocked her.She learns a shocking truth she didn't want to know.