Kang Hana

-her parents died from a car crash (only Hana and her older sister survived)

-Lives alone while her sister is studying at Seoul University

-Her sister name is Kang Ji-hye sends money, but Hana insisted that she should keep the money (Hana works a part-time job in a cafe)

-Her cousin named Kang Sang Min typically Hana travels to Seoul to visit her sister and cousin for the holidays/ vacation

-Her friends have only seen
Sang-min on old pictures

-Kang Han is portrayed by Twice’s Tzuyu

Kang Sang-min

-cousins with Hana by his mother's side

-countless attempts to convince Hana to move to Seoul and finish her school have failed

-overprotective to Hana like a big brother

-works in an entertainment office in a marketing 

-He only let Hana finish her school in Busan if she calls every other week to check on her 

-helps his cousins by sending money to pay for Ji-Hye's schooling

Kang Ji-Hye

-used to live with Hana in Busan at her old parents' home

-before their parents died Ji-hye had been discussing her dream to study at Seoul

-Hana had pushed her sister into accepting her enrollment to the school

-works two part-time jobs to afford school and send her sister money

-calls Shi-Won's parents to check on Hana every now and then