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.

So Jin fails to meet Yeon Woo at the Han River, and she runs into Kang Hoon instead. Just when she thought she failed the experiment, she realizes that her telepathic message could've been interfered. So Jin and Yeon Woo go on a trip to Gapyeong to see a celestial show. Kang Hoon joins them in secret to stop Yeon Woo from hitting on So Jin.