“Shall we go on a trip?”
　　Jin-wook and So-ri couple have been dating for 6 years. So-ri randomly suggests that they should go on a trip along with her best friend Mi-ra and her boyfriend. It is because she promised with Mi-ra before that the four should go on a trip together once Mi-ra has a boyfriend.
　　Jin-wook does not feel comfortable with her plan because he has not been inte...