When Haruki went to see Haruyo performing on the stage along with the 4th gen member who are here with her and he went to the VIP seat to see his sister dance and sing.
Haruki: thank you so much Kawata and good luck with your performance
Kawata: sure and please enjoy everything the song that Paru had sing
Haruki: sure I will enjoy waving straight to her if she can see me
Back at the dressing room stage and later Kawata Hina had to be dragged over to Haruyo to tell her that her brother is there to see her performing on stage while he was seating in the VIP seats.
Kawata: hey...Haruyo your brother is here to see you performing on stage
Haruyo: huh...? Nii-chan was here to see me where did he have a seat
Kawata: oh he was seating at the VIP lounge near the stage while you performed
Meanwhile, the Hinatazaka46 member idol had gotten ready for their performance to everyone who are here for them and they have sing the song while Haruyo can't see her brother in the VIP lounge seat but it was too far apart to see him inside the window.
Haruki: yes nii-chan I was having fun seeing Haruyo sing and dance
Karuki: okay and have fun nii-san please be back while you finish whatever you are done
Haruki: sure of course I will let Haruyo know that
Once Haruki had ended the call from Karuki to back home while he was pretty excited to have a huge surprise went they had to come back to the performance with Haruyo.
Haruyo: Hina where is Nii-chan I didn't see him at the VIP lounge seat
Kawata: oh he had a call so he have to go out from the VIP lounge seat to make a call
Haruyo: wait...it is the last song right, Sasaki?
Later Sasaki Kumi nodded at Yamaguchi while she went out of the dressing room and look for her brother finally, she found Haruki was doing texting someone on his phone and she had to jump scared on his back of a sudden, Haruki had to turn around and see that was Haruyo who had to scare him.
Haruki: hey...Haruyo I'm sorry I didn't have time to see you performing on stage
Haruyo: it's okay but did Karuki call you on your phone
Haruki: yes he did but I want you to bring me inside the dressing room and introduce me to another half of the 4th gen member
Without any sound coming from Yamaguchi and she grabbed Haruki's shoulder while we are at inside the dressing room others can see that Haruki was there to greet them in person.
Haruyo: I'm sorry nii-chan wants to greet the other half of the 4th gen member
Watanabe: hello my name is Watanabe Rina just call me Rina
Haruki: nice to meet you Rina and next up is who wants to greet me
The Hinatazaka46 member of 1st with 2nd gen members is going out from the dressing room at the stage while the few others are introduced to Yamaguchi Haruyo's brothers who are here to greet them one by one in person.
Yamashita: Hi my name is Yamashita Haruka just call me Yamashita
Haruki: nice to meet you, Yamashita and the next member
Miyachi: senpai my name is Miyachi Sumire just call me Sumire
Once Haruki had to know everyone's name in just one second before he want to go back and see his brother at his house along with his sister Kuromi Haruka.
Haruki: thank you so much for telling me your name to me but we are late to see my brother right, Haruyo?
Haruyo: yes that's right we are late and don't worry nii-chan will come back here to have a word with you all
Hinano: just promise me something before you come back here by tomorrow
Yamaguchi Haruki nodded at Hinano while he was taking her hand and went out from the dressing room stage a few other members had to see them leaving the stage and go back from home to see his brother at the house.
Haruki: nii-chan we are home
Haruyo: nii-chan where is Karuki?
Haruki: nii-chan where are you please stop scaring us
Before Haruki and Haruyo were walking inside the house and later they found out that Karuki with Kuromi wasn't there at the atoll but where did they go to anyway at the house?
Haruyo: nii-chan where is your brother Karuki?
Haruki: nii-chan please answer me I want you to give us a sign
Haruyo: did he go somewhere and bring along Kuromi too
Out of the blue, Karuki had to go somewhere to Seika's house and they have to see them inside the house with Haruyo they look like scared just with an empty living room with no people living inside the house.
Seika: Karuki that was not nice that you did to Haruki and Haruyo
Karuki: I just want to have some funny and scary prank
Kuromi: Haruyo can't take the scare but Haruki I don't know what that
Meanwhile, Karuki was playing the door upstairs while Haruki and Haruyo can hear them but they went upstairs to check it out and why did the sound coming from.
Haruki: Haruyo are you scared?
Haruyo: yes I am scared nii-chan please hold my hand tight
Haruki: sure I will hold your hand tight and don't let go okay
Haruyo was holding his hand so tight and later we arrive at the creepy door that just opened and closed at the same time Haruki stopped and Haruyo are stopped by his shoulder and both of them and same with Karuki and Seika are watching from his house along with Kubo and Nagi with Kuromi along.
Haruyo: wait...nii-chan why are we stopping out of the blue
Haruki: Haruyo please close your eye I don't want you to see these
Haruyo: okay nii-chan I won't open my eye while you will say can open my eye
Suddenly, Haruki's right hand was put straight to whatever he was pointing at but back to Seika's house there have Karuki and he can't see anything in front of Haruki.
Haruki: show yourself I'm not afraid of you
Mirror Haruki: well...well...you got some guts coming here alone and you bring your sister along with you
Haruki: shut up you can't touch her not yet but please return inside my body
Right before Mirror Haruki was absorbed into Haruki's body and he had still holding Haruyo's hand and never let go of her hand the Mirror Haruki was gone and he was back to Haruki's body where he belonged this whole time.
Haruki: hey...Haruyo...can open your eye now *collapse*
Haruyo: nii-chan please wake up what happened here? *tears*
Karuki: I'm sorry both of you it is all my fault Haruyo please forgive us not Kuromi
One year later back inside Haruki's lab room with Haruyo who was waiting for her brother to wake up from his deep sleep she are watching until Haruki woke up from his deep sleep in the lab room.