So-jin discovers that Yeon-woo has a special scent that she's attracted to, so she decides to figure out if he's her DNA lover. So-jin meets her sister and mother to commemorate her dad's death anniversary at Kang-hoon's restaurant. The family gathering doesn't go too well, and they end up fighting. Yeon-woo, who happens to be at the restaurant, overhears So-jin's family's history.

So-jin finds out that Yeon-woo has the Indecent Octopus Tentacles Gene and thinks he's a cheater. She breaks the news to Yeon-woo, which leaves him flabbergasted. Meanwhile, the woman Yeon-woo's father is seeing gets the DNA test done for the baby in her womb and hears shocking news.

Yeon-woo saves So-jin from Oh Sang-min, her ex. Yeon-woo tries to kiss So-jin, and Kang-hoon witnesses it. Kang-hoon warns Yeon-woo to stay away from So-jin and not to hurt her. However, Yeon-woo decides to continue with the experiment So-jin suggested. Meanwhile, seeing how Yeon-woo keeps appearing in her path, So-jin starts to believe that the two of them share a telepathic gene.