Ha-Kyeong throws the medicine into the trash can in Last Summer episode 3. She goes out. Ha-Kyeong is in the office to think about Do-Ha’s words. She gives the nose clip to her colleague Da-Ye. They go to work. But Da-Ye doesn’t do her job well. Ha-Kyeong is furious to tell the girl to go home. Da-Ye calls her mother. She cries to complain it to her. Ha-Kyeong gets a message from Soo-Hyeok. He informs her that the mediation day was decided.
Soo-Hyeok visits Do-Ha when the guy is making the cages in his office. They have lunch together. Soo-Hyeok thinks Ha-Kyeong won’t agree if he does agreement partition. Two months ago, Do-Ha met Soo-Hyeok at a cafe. He asked him to delay the case until the summer is over.
Do-Ha confesses it to Soo-Hyeok that he cares for the peanut house because it’s his home. Soo-Hyeok decides to look into Do-Ha. Because Do-Ha is the plaintiff. Do-Ha took Ha-Kyeong to go to watch the sunrise. She confessed her feelings to him.
But Ha-Kyeong regretted it. She asked Do-Ha to leave her house. He insisted on living with her. She returned to her room. She concealed the box. The next day, Ha-Kyeong walked out of her room. She turned on the TV in the living room. She was told that the Summer Triangle is going to appear. She saw the medicine Do-Ha left on the table.
Ha-Kyeong returns to the office. She wants to go home because the buyers isn’t interested in her house anymore after they heard her house was flooded. But town head asks her to go to Pacheon City Hall. Because the mayor plans to renovate the school building. Ha-Kyeong goes to Pacheon City Hall. She visits Ye-Eun in the office. She’s told that the mayor plans to build an observatory. Do-Ha is the designer. Do-Ha shows up. He pretends to see Ha-Kyeong the first time.
Do-Ha gives a presentation in the meeting room. He says that the abandoned school gives him a feeling that he’s watching the stars. Ha-Kyeong remembers she and Do-Ha watched the stars together on the roof. Ye-Eun asks Ha-Kyeong to give Do-Ha some suggestions. Because Ha-Kyeong is the person in charge. Ha-Kyeong points out that there’s nobody will welcome the observatory in the town. Do-Ha offers to work with the girl.
Do-Ha and Ha-Kyeong go to the school. Do-Ha reveals he wants to build an observatory for his brother. They enter the school. Ha-Kyeong sees the name Tianjin Four. She remembers Do-Ha was the one who decided the name of their club.
We go to the high school time of Do-Ha and Ha-Kyeong. Lee Seul is told that the name of their club is called “Magpie Bridge”. Do-Ha tells the girl that she won’t break up if she confesses under the Summer Triangle. She’s very happy. She offers to go to watch the stars together. But Ha-Kyeong thinks it’s a superstition. She reminds Lee Seul that she’s a high school student. But the girl doesn’t listen to Ha-Kyeong.
Ha-Kyeong leaves. Do-Ha and the people enter the club. Do-Ha’s colleague Park Hyun recognizes Do-Ha from the photo. He figures it out that Do-Ha studied at the school. Do-Ha removes the desk. He shows the ventilation opening to Park Hyun.
Ha-Kyeong is at home in the evening. She opens the box. She remembers he told Do-Ha that she doesn’t want to open the box. Because it’s full of memories. She tries to sleep in the bed. But she discovers that Do-Ha is fixing the light in the basement. He asks her if she’s fine. She goes to the kitchen. She opens the fridge. She uses the cold bottles to cool her face down. She’s startled after he showed up behind her. She’s furious to ask him not to carry out the construction. She claims that she doesn’t cherish anything there. But he knows she’s telling him a lie. Because he discovered that she didn’t throw anything from the basement. She denies it. She thinks he knows nothing. He thinks she cherishes the stuff he likes. So she didn’t throw away the stuff in the box. He wonders if she’s going to leave home again. She claims that she won’t do that because it’s her home. He reminds her that she’s not a kid.
The next day, Na-Hyun summons Soo-Hyeok to her office. She gives a case to her brother. But he wants to focus on the peanut house case. Lee Seul is in Ha-Kyeong’s house. She finds out that the basement was a disaster. She wonders what Do-Ha is going to do. Ha-Kyeong remembers the guy told her that he doesn’t want to leave. Soo-Hyeok visits her. Lee Seul notices that the guy is like Do-Ha when he checks the house. Ha-Kyeong figures out the reason why Soo-Hyeok helped Do-Ha. Lee Seul reminds Ha-Kyeong that the guy is her type. But Ha-Kyeong thinks the guy won’t go out with her. Lee Seul leaves the house. She lets the two stay alone.
Soo-Hyeok figures it out that Ha-Kyeong likes Do-Ha very much after he read her letters. He wants to know the truth. She is furious to claim that the truth is that she wants to leave the house. He reveals he accepted the case because Do-Ha promised him that he will have meal with him ten times. He wonders where the guy went.
Do-Ha cooks for the construction workers in the cafeteria with his father. The construction workers are very happy after they ate the chicken. They talk about Do-Ha’s family. We are told that the family had two sons. Do-Ha has to play two roles because his brother died. Do-Ha and his father talk about how to design the dome of the observatory. His father gives him an idea.
Ki-Ho asks Do-Ha to come home to have a dinner. Do-Ha rejects it because he has an important meeting. Ki-Ho receives a message from Ha-Kyeong. She complains it to him that the wallpaper in her house is starting to mold. Ki-Ho laughs to show Do-Ha the message. Do-Ha thinks the girl always uses his family when she doesn’t know how to deal with him. Ki-Ho brings up that Ha-Kyeong thought Do-Ha wants to go home when everyone worried about the guy.
Do-Ha drives his car on the road in the evening. He remembers his father reminded him that he needs to do something for himself. Ha-Kyeong is in the office. She receives a message from her uncle Ki-Ho. He promises her that his son will handle the house. Ji-Ae needs someone to be on duty. Ha-Kyeong volunteers to do the job.
Da-Ye and Ha-Kyeong are on duty. Da-Ye laughs when she watches the video. She notices the papers Ha-Kyeong is reading. Ha-Kyeong tells the girl not to care for the project because it was designed by a sick designer. She receives the report that some students sneaked into the abandoned school. She goes to the school. She sees some people setting off fireworks in the school. She doesn’t have key. So she has to climb over the gate. She remembers Do-Ha reached out his hand to her when she tried to climb over the gate.
Ha-Kyeong enters the school building. She follows the student. She remembers she and Do-Ha hid in the classroom when the teacher came to arrest them. She thought what they do isn’t right because they sneaked into the school for confession. He wondered if she has a person that she doesn’t want to break up with. She found out that he’s grabbing her hand.
Do-Yeong found the two. He took them to the roof. Lee Seul and Seung-Taek were waiting for them. Do-Yeong guided the people to watch the stars. He took a photo of the people. Do-Ha caught the chance to hold Ha-Kyeong’s hand. She was shocked to look at him. But she accepted it soon.
Ha-Kyeong gets out of the memory. She finds out that she’s on the roof. She sees the students who are setting off fireworks. The police arrive. The students are arrested.
Ha-Kyeong returns home. She remembers Do-Ha visited the house when she was watering the flower. Do-Yeong welcomed his brother. He offered to go to watch stars. So they went to the roof. Ha-Kyeong, Do-Yeong and Do-Ha became good friends after they watched the stars together. But the crack appeared after Do-Ha held Ha-Kyeong’s hand. Do-Yeong didn’t say anything. But he was in jealousy after his brother got his girl.
One day, Ha-Kyeong was drunk. She kissed Do-Ha. Do-Yeong witnessed it. He sneaked into Ha-Kyeong’s room when the girl was sleeping. He took her to go to watch the sunrise. She confessed her feelings to him. He approached her.
SEE ALSO: Last Summer Episode 2 Recap
The next day, Ha-Kyeong goes to work. She’s told that she’s going to join the City Hall. She visits Ye-Eun in the City Hall. Ye-Eun asks Ha-Kyeong to go to sign the contract with Do-Ha. She learns that Do-Ha was the one who helped her get the job.
SEE ALSO: Last Summer Episode 4 Recap
Lee Seul accompanies Seung-Taek on a talk. She believes that Do-Ha has an evil plan. She reveals she doesn’t know Ha-Kyeong. Ha-Kyeong visits Do-Ha. She gives the contract to him. He reveals he plans to fix their relationship because they’re not happy. He signs the contract. He returns the contract to her. He believes that he will know her feelings as long as he stays with her. He tells her that he’s going to like her. Ha-Kyeong told Do-Yeong that she likes Do-Ha. Do-Yeong left. He asked Ha-Kyeong to guard the house with Do-Ha.