Crash Course in Romance S01E16 - Chapter 16: You and I the Union of Two Universes

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.