Heeseung is your step-brother. A few years ago, your dad and his mum got married. Now, he's 18 and you're 17. You're both in the same high school.

Today's your birthday. Coincidentally, it's also Heeseung's birthday. Every since your dad and his mum got married, they seemed to have forgotten about you. It hurts you a lot but you never show it. They only love Heeseung. Not you.

Heeseung's mum: "Happy birthday!" Your dad: "Happy birthday, Heeseung. You're an adult now!"