When Sunghoon was 13 years old, he expressed his feelings for Yoona who was 5 years older than him. It was before Sunghoon moved to Europe that Sunghoon expressed his feelings for Yoona.However, Yoona rejected Sunghoon because Sunghoon was still so young compared to her, but that didn't make Sunghoon give up, instead he made a promise

"When I grow up I will be your husband Eonnie."

thirteen years later, Yoona is 29 years old and now has opened an art gallery. Yoona has a meeting with a well-known company and 2 hours before the meeting, Yoona accidentally bumped into a man's back The man is tall, has a big body posture, and even looks handsome even when seen from behind. He is Sunghoon, who is a famous CEO