Yeon-woo asks So-jin to break up with him, saying Kang-hoon is meant for her. Upon hearing So-jin's breakup with Yeon-woo, Yeon-woo tries his best to console her. Kang-hoon asks So-jin out for a date, but So-jin keeps getting reminded of the days she spent with Yeon-woo. Meanwhile, Kan-hoon falls into a critical state after a fire breaks out in an empty house.

After getting advice from A-ri, Kang-hoon decides to make So-jin's heart race for him so she can see him as a man. Yeon-woo visits Tree Orphanage which his dad sponsored for 20 years and meets Father Andrea there. Meanwhile, So-jin ends up going to volunteer work with the entire Sim Hospital staff and meets Yeon-woo for the first time after their breakup.

Kang Hoon discovers that someone was trying to set So Jin's place on fire through a flowerpot. Yeon Woo decides to quit his job at the hospital and leave for the US. He does so to prove that giving up is also proof of his love for So Jin. Meanwhile, Kang Hoon visits the plantation that provides grass trees and finds out who's been sending the flowerpots.