Han Yeo-reum thinks her new surgeon boyfriend Nam Ha-jin is an ideal match, until she catches him on a blind date.
After being upset with her boyfriend, Yeo-reum wakes up at her ex Kang Tae-ha's place without the memory of how she got there; Ha-jin is perplexed that Yeo-reum isn't home on her birthday.
Ha-jin proposes to Yeo-reum; Yoon Sol can't get over her recent rejection; Tae-ha takes the Summer and Evergreen team to check out a new bar.
Ha-jin and Tae-ha formally meet; Yeo-reum and Sol give a presentation at DK Construction; Ha-jin seeks someone from his past.
Ha-jin and Tae-ha get into a fight; Yeo-reum's text message for Ha-jin is accidentally sent to Tae-ha; Tae-ha disapproves of Yeo-reum's design plans.
Ha-jin is unreachable in spite of having made plans with Yeo-reum earlier; Tae-ha believes that Yeo-reum will come back to him.
Jung Yu-mi
Han Yeo-Reum
Eric Mun
Kang Tae-Ha
Sung-joon
Nam Ha-Jin
Yoon Hyun-min
Do Joon-ho
Kim Seul-gi
Yoon Sol