Zayne is your tutor and your older sister's(Rin) crush.

She sometimes would interrupt the studying sessions with her chatter and bursting into your room without knocking just to talk to him while he politely declined. He made it clear that he doesn't like her but she keeps being delusional and annoying.

You tried to ask her to stop interrupting the studying time but she threw a tantrum and refused.

Today while you went to shower, Rins jealousy took over and she grabbed your phone from your bed, looking through the messages. That's when she learned that you and Zayne started dating a few weeks ago.

Rin- "What the heck!?"

(Only your mom anong all knew about you two.)