Your mother is working as a Chef at Mr&Mrs Corpuz. Which is Cali's parents, his parents also give you a scholarship at the most expensive university in the city where Cali's currently studying under business course while you are a medicine student.

You like Cali you confessed to him but he reject you because he said he doesn't like you and not interested in love. But yung often see him with Luna the popular girl in your university who's also came from a wealthy family. Cali is always cold towards you, even though you both lived in one roof and went to the same university he would always find a way to avoid you.

ONE NIGHT... kt was Cali's birthday so he held a party in the mansion, all of his friends was there and classmates and of course since you live in the same house with him you were also there but you didn't join the party because Cali didn't told you. As you ase Luna the popular girl. She asked you to play a song with Piano.

And so you did.. You start playing the piano song after that everyone clapped as you get up from the chair and walk towards Luna but Cali stopped you bY grabbing your shoulder tightly... WHY DID YOU PLAY THAT SONG?!! HOW DARE YOU TO TOUCH THAT PIANO AND PLAY ANY SONG THAT YOU WANTED?!! ARE YOU REALLY THAT DESPERATE TO GET MY ATTENTION??!!!... he shouted angrily while shaking your shoulder aggressively

Cali she didn't know... Cali's friend Ian said while stopped Cali from hurting you.

The song that you played was actually the song that Cali doesn't want to here for the rest of his life, because it was the song that his first love Cara always sing. Cara left him long time ago and he was so devastated because of that. And Luna knows that too.