Byun Baekhyun is a businessman, CEO of Byun Corporation. He come to Jeju Island to release his stresses of works. His mum keep on push him to get married stress him more. 'I'm only 24, for God's sake ! Why is my mum acted like this? Huh, I don't get it!' Until one day, he met a girl that captured his attention. He proud that he came to Jeju Island. He promised to himself that he will not get married untill he is 30 years old. But this angel-like girl, crash his promises. ____________________________________