When Tatsuya returns from the most dangerous Mission ever but he didn't visit his sister at her performance or on TV shows to support her because he is the spy agent that she didn't know of her Brother.
Tatsuya: can I take my day off
HQ: of course but I think your sister worried sick about you
Tatsuya: don't worry about Nagi and she can visit me and I sent a LINE message
HQ: sure if we have some left Mission of you I let you know
Tatsuya takes his leave and returns to his home in Japan where he was from at Kanagawa.
Jackson: see you around if you ever come back to Korea
Tatsuya: sure you can contact me and stay in touch
Jackson: you too
When he use his racing car and suddenly Tatsuya was back in Kanagawa, Japan where he was living but his sister is staying at the Nogizaka dorm where all of the idol groups were.
Tatsuya: I miss home
Later Tatsuya park his racing car in the garage when he notice that someone was inside his house and he saw it was on his top criminal wanted list in Japan here at my house.
Tatsuya: drop your gun down!!
He slowly turn around and went to Tatsuya to see what it was his assistant was doing here at his house full of security systems.
Tatsuya: wait I thought you are bad guys
Jin: sorry to go inside your house
Tatsuya: what are you doing here?
Jin: HQ sent me here to servant you
Tatsuya: HQ sent you to be my servant?
Out of a sudden, Tatsuya had a call from Inoue Nagi to the Nogizaka dorm but he just pick up her call from Nagi.
Tatsuya: sorry Jin I need to take this call from my sister
Jin: sure I went to get a drink from the table
Tatsuya: sure help yourself
When Tatsuya answers his sister's call and she answers her Brother's call on her phone.
Nagi: Nii-chan is that you?
Tatsuya: yes and I'm sorry I went to Korea for work
Nagi: Nii-chan can you visit me at the Nogizaka studio I miss you
Tatsuya: of course, I will but please tell Himura to have an extra chair
Nagi: thank you Nii-chan
Tatsuya: don't worry I will be there in 2 minutes
They ended their call to each other and Tatsuya put a hand sign to Jin to bring some gun if there anything happens to Nagi we will protect her whenever she was.
Tatsuya: did you bring the bullet vest
Jin: yes sir I had to pack the bullet vest
Then we went to the garage and Tatsuya take the James Bond car to see Nagi at the Nogizaka studio.
Tatsuya: Jin you drive while I connect the drone to find some bad guys
Jin: copy that sir
When Jin was driving the James Bond car to Japan and some people taking pictures of my car on Japan street went we had arrived at the Nogizaka studio and we park near the entrance of the studio.
Tatsuya: so is where Nagi works as an idol group?
Jin: so what to go next?
Sudden Nagi see that her Brother had reached here with someone along with him by his side.
Nagi: welcome Nii-chan to Nogizaka studio who is he?
Tatsuya: he is my business partner his name was Jin
Jin: Nice to meet you Inoue Nagi *bow*
Nagi: please Nii-chan follow me and Jin too
Tatsuya: where are we going?
Nagi: just wait and see
Later right after Nagi brings Tatsuya and Jin to the stage and both of them can sense something is not right with the Nogizaka crew or staff members.
Jin: sir they look so suspicious to be a Nogizaka crew or staff
Tatsuya: yes you take of Magi while I do my part
Jin: of course sir please be careful
Tatsuya: I will and now...
They both nodded at each other and Nagi was confused why Tatsuya went to the crew or staff member but not to the Nogizaka46 Member to meet them suddenly, Tatsuya take out his gun and sudden shot at the ceiling and they got attention to the Agent was here to arrest them.
Tatsuya: both of you stop what are you doing?
One of them starts to run away but Tatsuya uses handcuffs on the weakling bad guy and he teleported to the Korean jail Jin throws the golden gun toward Tatsuya's hand.
Tatsuya: thanks Jin
Jin: now shoot him!!
He shoots the golden gun at him and suddenly he turns into ash his friend is in the Korean jail and he has to die for his pal friend.
Tatsuya: are you okay, Nagi?
Nagi: what the hell is going here and why did you arrest him and shoot him with a gun?
Jin: I know you had a lot of questions but he needs to let you think to decide to talk to him
Tatsuya: Nagi, I'm sorry but I need to go we make a scene here
When Jin and Tatsuya left the Nogizaka dorm and left with the car and she know him as a real agent spy but she didn't know very well of his brother that well.
Minami: he is a great spy agent you had there, Nagi
Nagi: Umezawa what did you say about my Nii-chan?
Minami: he is a spy agent from both country Korea and Japan
Nagi: wait did you say that Nii-chan is a spy agent?
Minami: yes
Nagi: I don't believe you that is no way Nii-chan is a spy agent
She just went inside back to the Nogizaka studio and just only Nagi was outside the studio if she believe what Umezawa is saying about Nii-chan as a spy agent and the same with Jin too together Nii-chan.
Nagi POV.
I don't believe this is true about Nii-chan being a spy agent with Jin too but he keeps lying to me and I need to find the truth myself.