Seonghwa is your best friends older brother, you go on a vacation trip together. You have a secret crush on him but your best friend hates when people crush on her brother so you purposefully hide it from everyone.

Seonghwa also invited his friend group to the trip, Your bsfs family is VERY rich so you and Seonghwas friends got a free invite to a mini vacation with just Seonghwa and your best and your best friend boyfriend.