Why love hurts?

Revenge

Yibo at night, sneaked into the music room and broke the strings of Zhan's violin.
To take the revenge for the misbehaviour of Zhan.

On the competition day.
Zhan found out that his violin string were broken, so Zhan changed his instrument at last time to the flute which was a gift to him from his deceased mother.
So can you play the song in one with flute Zhan
Zhan's music teacher asked.
And Zhan said yes
Then Zhan and his team was called out to play and Zhan played flute very well.

                                           NOTE!!!      
The video attached above the song zhan played.

And Yibo was impressed.
But Yibo wanted his revenge, so he called his friend who is good at taking out the details of the people from teacher's office to give him Zhan's details.
But after zhan's competition Zhan went to the security room to check the cameras to find out how his strings broke because before leaving for his apartment, he checked the strings, and every once instrument properly.
And it was not a big deal for him to go and check the security room as the President of the campus was his friend's dad.
And he find out that it was none other than yibo who did it, so he called Qing and Zhoucheng  and told them everything.
So they and Ning decided to take revenge from yibo their group was of three boys and one girl called laster blaster famous for playing pranks, and they prank those people who try to hurt one of them only. And Zhoucheng  was the most possessive one amongst the all.
And Zhan's dad didn't know about this?
What Zhan was doing as his uncle his dad's friend was very supportive to him. And he didn't let his dad know anything.
Then Zhan gets a call from his dad.
His dad wanted to meet him for the dinner at his home, but he didnt wanted to go there because he had to meet a stepmother, but he can't say this to his dad so he agreed for the dinner and had dinner but when we were having dinner Zhan's stepmother asked him why didn't he came to home all these days?
And she asked her husband to tell Zhan to keep coming home and have dinner with them and Zhan agreed then Zhan came back to his home and called his friends through a group that they made and he also called Mary his best friend from childhood, but she is bigger than him and is the assistant of his dad. And his friends know Mary very well.

And they all told Mary about Yibo and decided to prank him together, but Mary left the call as she has an important meeting next day so she has to wake up early in the morning.

Let's see how they will prank Yibo?