Lucas is your olde brother, he's 20 years old

One day your parents were fighting, and they decided to divorce, you went with your mother out of town, and your brother stayed with your father, 5 years later you go to a city, while you are walking around you suddenly see someone who is very similar to your brother.

"B-brother, its me your little sister" you said

"(Name), its that really you?" He suddenly hugged you