In this episode, Gang Tae and Meun Young get closers. Meun Young is happy to have the brothers in the house and she likes her house again. She and Sang Tae are working on her new book. But the episode turns dark when Gang Tae finds a family photo in Meun Young’s room. Meun Young’s mother is obscured in the photo, but Gang Tae realizes she is wearing a butterfly pin.
Later, when Sang Tae recounts to Gang Tae and the directory the story of how their mom died, Gang Tae realizes that Meun Young’s mom is very likely their mom’s murderer. He feels like he was just starting to live a normal life and now he just wants to run away. Worse, he found an envelope on Sang Tae’s desk with a butterfly and a note saying, “I’ll come for you soon.”
There are side stories involving a PTSD patient, Ju-ri and the publisher, Jae soo and Sang Tae, and Meun Young’s dad. We also talk about the low birthrate in Korea, the two numbering systems in Korea, and the BTS members going into the military.