Do-Ha goes for a morning run in Last Summer episode 5. He comes back. He sees Ha-Kyeong in the yard. He asks her if she slept well last night. She claims that she had a good sleeping. She returns to the house. She sees the sandwich he left for her in the fridge.

Do-Ha and Ha-Kyeong go out. The Village Chiefs find out that the two lived together. They laugh. They persuade Do-Ha and Ha-Kyeong to go to greet the neighbors. But the two don’t have any azalea wine. Ha-Kyeong goes to the city hall to work. She reports it to Ye-Eun that Do-Ha planned to complete the project On August 31st.
Do-Ha has a meeting with the colleagues at Pluto Atelier. He asks them not to waste the time. Do-Ha is in his office. Jong-Shin shows Do-Ha the detailed plan Ha-Kyeong sent to him. He learns that the girl supported them. He wonder why she changed his mind. He decides to work overtime. But Do-Ha wants to leave work on time.
Ha-Kyeong returns home in the evening. She sees Do-Ha lying on the floor of her place. She gets angry. She opens the fridge. She sees the kelp soup he prepared for her. He asks for a talk after she drank the kelp soup. They prepare a contract for each other. They do it for protecting themselves. Do-Ha wonders why Ha-Kyeong decided to live with him. She claims that she did it for shattering his illusions to the house.
The next day, Ha-Kyeong received a lot of packages for Do-Ha. She calls him. She’s furious to blame him. But he asks her to put it into her fridge. Do-Ha invites Jong-Shin and Park Hyun to his house. The two think Do-Ha is living with Ha-Kyeong. Do-Ha orders pizza. He invites Ha-Kyeong to eat with him. She smiles to reject it. The women’s association president brings the pancake to Ha-Kyeong. She mentions the girl helped her son study.
The following evening, Ha-Kyeong returns home. She sees Lee Seul and Seung-Taek. Lee Seul helps Do-Ha cook in the kitchen. She’s angry to ask him the reason why he came back. He reveals he wants to live with Ha-Kyeong who doesn’t grow up. Ha-Kyeong takes Seung-Taek to walk around the house. He wonders how Do-Ha made her agree to live together. Do-Ha shows up. He reveals he begged the girl. He has to leave if Ha-Kyeong still hates him before he completes the project. Seung-Taek praises Do-Ha. Do-Ha shows his friend the contract he and Ha-Kyeong made. Seung-Taek thinks the two don’t grow up after he read the contract.
Ha-Kyeong tries to stop Seung-Taek from reading the contract. But she crosses the line. Do-Ha reveals the clauses were written by Ha-Kyeong. He complains it to Seung-Taek that he was tired. Lee Seul is furious to ask Do-Ha to come to help her. Because she was the only one who worked in the kitchen.
The dinner is ready. The four have dinner together. They’re very happy. Do-Ha helps Seung-Taek get in the car outside the house. Lee Seul walks Ha-Kyeong in the yard. Lee Seul thinks the house is like a home. Ha-Kyeong looks around. She smiles. Lee Seul and Seung-Taek leave. Do-Ha and Ha-Kyeong see their friends off.
Lee Seul and Seung-Taek are in the car. They notice that Ha-Kyeong was very happy. Lee Seul plans to beat Do-Ha if he bullies Ha-Kyeong. Seung-Taek laughs. He points out that he won because Ha-Kyeong accepted Do-Ha. Lee Seul is angry to blame Ha-Kyeong. She wonders why her friend always loses. She sends some money to Seung-Taek. She reveals she was surprised when he wanted to visit Do-Ha. Because he never went to someone else’s house. He explains it to her that he did it because Do-Ha invited him.
Ha-Kyeong and Do-Ha clear the plates in the house. Do-Ha is surprised that Ha-Kyeong didn’t mock him. She praises him for inviting Seung-Taek. She wonders why he cooked for her. He reveals he did it for making her miss him. The two return to their rooms. Do-Ha plays the music. Ha-Kyeong tries to peek at the guy through the hole. He catches her. He wonders if she couldn’t sleep. She admits it. She claims that she wanted to read the book. She wonders if he contacted the lawyer after he changed the Mediation Day.
The next day, Ha-Kyeong works in the city hall. She reads the notice. She learns that Nam-Jin is reinstated. She’s shocked. Nam-Jin drinks with his friends at a restaurant. He runs into Soo-Hyeok. He introduces Soo-Hyeok as the top lawyer. But Soo-Hyeok ignores the guy. He enters the room. He meets Do-Ha. Soo-Hyeok wonders how Do-Ha made Ha-Kyeong change her mind. Because he knows the girl is a stubborn person. Do-Ha shakes hands with Nam-Jin in the restroom. He mentions they’re going to work together.
The next day, Do-Ha, Nam-Jin and Ha-Kyeong have a meeting in the meeting room. Ha-Kyeong worries that Do-Ha and Nam-Jin are going to have a fight. But she finds out that the two became good friends. Do-Ha has a talk with Ha-Kyeong at home. She’s furious to tell him that she dated Nam-Jin because of him.
The next day, Nam-Jin has a meeting with the construction workers on the construction site. The workers take Nam-Jin’s side. Ha-Kyeong calls Do-Ha. Because the guy doesn’t arrive. She’s told that he’s in the building. She takes Nam-Jin and the workers to see Do-Ha. Do-Ha scolds Nam-Jin because he didn’t tear down the wall. Nam-Jin claims that it’s a load-bearing wall. So he thinks they shouldn’t tear down the wall. The workers support Nam-Jin as well. Do-Ha lifts the hammer. He tears down the wall on his owner. The workers have to obey his order.
Ha-Kyeong is on the bus in the evening. She thinks she doesn’t know Do-Ha at all. She gets off the bus. It’s raining. She runs home. She sees the guy who wears the raincoat. She’s startled by him. She recognizes him. He mentions someone lived in the house. She reveals Ki-Ho’s son came back.
Ha-Kyeong takes a shower in the bathroom. She tries to open the door of the bathroom. But she fails. She calls Do-Ha. She asks him to come to help her because she’s trapped in the bathroom. He opens the door for her. She reveals she encountered a black goat when he’s fixing the door. She tells him that the house isn’t simple at all. She mentions the door and the faucet fixed on their own. She suspects that there’s a ghost in the house. But she’s told that he fixed the door and the faucet.
The next day, So-Hee visits Do-Ha. Ha-Kyeong sees the girl after she opened the door. So-Hee swears to take away Do-Ha. She knows he came back for Ha-Kyeong. Do-Ha visits Ha-Kyeong. He tries to explain it to her about him and the girl’s relationship. But she thinks he doesn’t have to do that. Because it wasn’t the first time that he took a friend home. But she thinks he shouldn’t have told a wrong address to the girl. Because the girl rang the doorbell of her house.
The next day, Ha-Kyeong is off duty. She leaves the city hall. So-Hee is waiting for Ha-Kyeong. The two go to a cafe. Ha-Kyeong is told that So-Hee knows her. Because Do-Ha and Do-Yeong kept mentioning the girl in front of So-Hee. So-Hee tells Ha-Kyeong that she likes the architect Do-Ha. She takes out two airplane tickets. She asks Ha-Kyeong to help Do-Ha return to his previous position.
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Ha-Kyeong returns home. She remembers So-Hee’s words that it’s a good chance to Do-Ha. She finds out that Little Watermelon is sick. She calls someone. She resolves the problem on her own. Do-Ha comes back. She blames him for fixing the shoe cabinet. Because it’s the signal that she sends to Little Watermelon. He realizes that something happened.
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Ha-Kyeong and Do-Ha take care of Little Watermelon together. Ha-Kyeong remembers her father fled when her mother was sick. She tells herself that Do-Ha is going to leave. But she notices that he’s holding her hand. He explains it to her that he did it because she looked cold.