Crash Course in Romance

Nam Haeng-seon's daughter is hospitalized and underwent surgery successfully, but is in coma. Unexpectedly, her real mother appears though it is obvious her interest is only in getting some of Chi-yeol's money. Chi-yeol is setting a trap for his assistant and pretending like everything's normal so he can follow him and find out where he lives.

Chi-yeol finds out where his assistant lives and discovers everything upon entering his apartment. His assistant feels trapped when he overhears that Haeng-seon's daughter is showing signs of getting better and decides his only way out is to kill her. He is stopped in the act and Chi-yeol chases him up to the roof where he confesses everything before jumping to his death. Haeng-seon's daughter regains consciousness and is undergoing rehabilitation. Her best friend finally gains courage to tells her he's in love with her, but she does not give him definitive answer for now.

Nam Haeng-seon's daughter tells everyone she's going to live in Japan with her biological mother so her mother stops asking Chi-yeol for money. Eventually, her real mother sees that her daughter does not want to go but is sacrificing herself for her aunt, and leaves alone. Gossips start spreading after Chi-yeol had a coffee with his old date, and due to circumstances, both Chi-yeol and Haeng-seon propose each other at the same time. Haeng-seon's daughter also gives her answer to her best friend, that she too is interested in him, and they become a couple.