Kim So Eun

The K-eldest-son and K-eldest-daughter meet while sacrificing themselves in search of happiness and love.

Oh Soo is a man in his 20's and works as a promising engineer in the IT field, a cafe owner and a barista. He is smart and handsome. He plays cupid for young men and women by using a mysterious pollen. Due to the pollen, he falls in love with Seo Yoo-Ri. She is also in her 20's and works as a police officer. She has a bright personality and supports her family by herself.

When Jo Yang Sun is driven out of house and home after her father is framed for a crime, she is forced to crossdress in order to make ends meet as a bookseller, where she meets Kim Sung Yeol, a handsome, but mysterious scholar who is actually a vampire. Meanwhile, an evil presence at the royal palace stops at nothing to keep the Crown Prince from claiming his rightful throne.

Jan Di is an average girl whose family owns a dry cleaning store located near the luxurious and well known Shin Hwa College. Jan Di meets the four richest and most spoiled boys known as the F4. After saving a boy from jumping off the roof of Shinhwa High School, she is admitted into the school on a swimming scholarship. Jan Di tries to avoid confrontation with the F4 at all cost because she knows what happens to those that stand against them. However, when Jan Di's friend, Oh Min Ji, accidentally gets ice cream on the leader of the F4's shoes, she's forced to declare war on the leader of the F4, Goo Joon Pyo. What will happen though, when she falls in love with someone from the F4 and Goo Joon Pyo start feeling something for her too? Will the love triangle disrupt F4 and change their lives forever?

The show pairs up Korean celebrities to show what life would be like if they were married. Each week, couples have assigned missions to complete, with candid interviews of the participants to reveal their thoughts and feelings.