Episode 7

Saijo Yui (Matsuoka Mayu) is listening to her junior Sugita Sho (Izumizawa Yuki).Last night, Sugita heard screaming when he came home and rushed to find high school student Kana Misa (Nakayama Nakayama) squatting on the ground.

“Suddenly a strange man attacked me” with a stick, and Misa trembled with fear.Afterwards, Sugita's mobile phone received a message from Misa.“The prisoner must be caught!”.

Saijo, Kira Asami (Tanaka Minami), and Kiyama Iori (Takizawa Korei) were chatting happily at their usual izakaya when Serizawa Naoki (Nakamura Aoi) came to ask for help.Then a young woman appeared, she was Serizawa's sister Rina (Riho Nakamura). Rina is a fourth-year university student. She has successfully found a job and is coming to Tokyo this time.She received instructions from her mother to persuade Serizawa to go back to her hometown for a blind date. If Serizawa was unwilling, she would not be able to reimburse the travel expenses to and from Tokyo, so she kept pestering Serizawa.

Rina originally planned to live in Serizawa's house, but Serizawa refused and asked her to live in Saijo's house.Saijo was surprised, but because he owed Serizawa a favor for what happened a few days ago, he reluctantly agreed to let Rina stay overnight.

Rina dances and holds parties at Saijo's house, and her overly cheerful behavior makes Saijo feel tired.On the other hand, Misa, who is worried about the investigation of the incident, goes to Sugita's house...