Yu Jin went to Joon Sang's apartment. Mei Xi opened the door, but Joon Sang was not there. Yu Jin tried to confirm whether Joon Sang was her half-brother. Mei Xi did not reply directly, and just told her to give up...

Yu Jin found Joon Sang in his office. She asked him whether he was really her brother. Eventually, he admitted, and she collapsed on the floor. Yu Jin went back to her mum's house, telling her she has broken up with Joon Sang, and cried.

Joon Sang went home. Mei Xi was waiting. Joon Sang felt dizzy and Mei Xi put him in bed. Although Mei Xi wanted to talk, he told her that he wanted to be alone so she left.

Zhen Yu went to Joon Sang's apartment. Joon Sang came to answer the door, and fainted. Zhen Yu took him to the hospital, and had a blood test (to donate blood to Joon Sang).

Choi Lim heard about Joon Sang and Yu Jin’s breakup from Zhen Suk. She asked Sang Hyuk to confirm the news... Sang Hyuk's phone rang. On the other side of the phone, Zhen Yu told him that Joon Sang was in the hospital.

Choi Lim and Sang Hyuk visited Joon Sang at the hospital. In his coma, Joon Sang kept calling for Yu Jin. Choi Lim asked Sang Hyuk why Yu Jin was not here. Eventually, she was told that Joon Sang and Yu Jin were siblings.

Joon Sang got better and Choi Lim accompanied him home. Before she left, Choi Lim turned back and told him to tell Yu Jin the truth and elope... She finally admitted that Man Yeong was Joon Sang...

Yu Jin went to Xin Zhou's grave, telling him that in her dream, she visited his grave happily with Joon Sang... after she realized that they were siblings, she should not have dreams like this anymore... Walking along the path, she saw a couple coming towards her, and had illusion that it was Joon Sang and herself...

Yu Jin told Sang Hyuk that she resigned from her work. As she could not contact Joon Sang, she asked Sang Hyuk to help... Yu Jin went back to Polaris to pack her things. She packed the model of the impossible mansion (designed by her) and left. Joon Sang was outside her office and he followed her...

Yu Jin walked to the park with the model and sat there. A kid came by and played with the model. Yu Jin asked the kid whether he wanted the model for she had no need for it anymore: her dream house has already been built in her heart... When she got up from the bench, she found Joon Sang...

Over a drink, Joon Sang apologized for hiding the truth from her. Yu Jin told him that she loved him... she loved him in the past and would love him in the future. She was not ashamed as their love brought her happiness as well as sadness. It was her treasured memory... and asked him to promise her not to forget as she would not... Joon Sang gave her his promise... As they parted, Yu Jin gave Joon Sang the model of the impossible house... asked him not to turn back as she did not want the last memory of Joon Sang to be his back... Joon Sang agreed... and they walked their separate ways...

The hospital rang Zhen Yu about his blood test. At the hospital, the doctor told him that the result of the blood test suggested that he was related to Joon Sang. The shocked Zhen Yu sought Mei Xi’s confirmation. Eventually, she admitted that Joon Sang was Zhen Yu's son.

Joon Sang fainted at his office and was taken to the hospital. The doctor told him that his traffic accidents in the past resulted in blood clots in his brain. The doctor suggested operation soon as the blood clot would affect his sight, brain functions and may be fatal... Joon Sang said he had to think about it.

Zhen Yu went to Joon Sang's apartment early in the morning. Joon Sang was not there so he waited downstairs. Eventually, a depressed Joon Sang came back. In Joon Sang's apartment, Zhen Yu told him that Joon Sang was his son.

In shock, Joon Sang went to confirm with Mei Xi, asked her the reasons for her lies and causing him such grieves. In tears, Mei Xi apologized as she wanted herself to believe that Joon Sang was Xin Zhou's son… she wanted to raise him as Xin Zhou's son...

Yu Jin told Sang Hyuk that she has decided to go to study in France. Sang Hyuk's senior suggested that Sang Hyuk should ask Yu Jin to stay...

Joon Sang went to Yu Jin's apartment, and waited downstairs. Yu Jin's phone rang and she went downstairs. Sang Hyuk asked her whether they could start afresh. Joon Sang saw this....