Things are finally starting to turn around for our supposedly ill-fated couple. They're able to experience a normal (well, their version of normal) life and romance. On top of that, they've got the big brother to complete their makeshift family. Nothing can knock them down... except, that is, a certain butterfly.
EPISODE 12: "Romeo and Juliet"
At the mansion, Kang-tae wakes up late and finds Moon-young and Sang-tae in the dining room, already hard at work on her next book. Kang-tae mentions that it's his day off, wanting to spend time with them, but they're too busy arguing over ideas to listen.
Kang-tae trudges back to his room and calls Jae-soo instead, asking if he wants to hang out. Jae-soo is still upset that Kang-tae called him his #3, and he rants that Kang-tae can't just use him willy-nilly. But when Kang-tae insists that he likes Jae-soo more than Moon-young and Sang-tae, Jae-soo happily invites him to his restaurant.
At the apartment building, Sang-in's about to leave to visit his parents. He tells Joo-ri that his father was hospitalized, and Seung-jae immediately calls him out on lying. He's actually going because his father makes him go on blind dates every month. Either way, before leaving, he promises to call Joo-ri sometime.
Over at the pizza place, admiring women are gawking at Kang-tae. Seeing that Kang-tae is obviously bummed, Jae-soo snaps a photo and sends it to Moon-young, along with the message, "Dear Ms. Go Moon-young, just like how ants are drawn to sweets, lots of women are getting ready to hit on my lonesome friend Kang-tae."
LOL, in no time, Moon-young is speeding down the highway and cursing that she's going to kill those ants. She comes into the pizza place and claims her spot at Kang-tae's table. And to make even more of a point, she drags a knife across a plate.
Meanwhile, at OK Hospital, Director Oh calls Nurse Park in to ask why she already cleared Ok-ran's bed. Nurse Park says that they might as well since runaways rarely come back. Director Oh insists that they don't do the same with Dae-hwan even though he's terminally ill.
Back at the pizza place, there are little kids running around, making Moon-young huff that she hates kids. She doesn't like that they're unreasonable, that they whine, and that they beg for love. But Kang-tae likes them for those exact reasons; it makes them enduring, like her.
"I'm not having your kids," she firmly states, making him choke on his drink. "I don't want to be jealous of my child." To that, he urges her to lean in, and when she does (expecting a kiss), he flicks her forehead. Not everyone can be a mother, he says.
Sang-tae returns to OK, and Director Oh is delighted to have him back. Sang-tae is still upset about the mural, though, so Director Oh stresses that he can't keep running from the butterflies. Besides, he says, not all butterflies are scary; in Greek culture, butterflies even symbolize "cure."
Director Oh suggests he and Sang-tae work together to get over this fear of butterflies. And though Sang-tae still seems unsure, he's slightly reassured with the word "cure."
In the car, Kang-tae asks Moon-young about her new story. She says that it centers around her and the brothers travelling in a camping car, and that they meet others even stranger than they are. She goes no further since she'd be going into spoilers. Kang-tae: "I'd like it if it had a happy ending." Moon-young: "Me too."
The couple stop by the supermarket for groceries, since Moon-young burned all their bread at breakfast. Having thought about it, Moon-young announces that she'd be okay with having a son as long as it looked like Kang-tae. She's talking way too loud and embarrassing him, so he puts an end to that conversation.
