All That We Loved

Go Yoo and So-yeon hang out more often and start to show their feelings for each other. Therefore, Joon-hee feels disappointed and left out. On Sunday night, Go Yoo and his friends are having a secret wine party at school, and he invites So-yeon to join them.

Subtle air flows between Yoo and Joon-hee due to their feelings for So-yeon. Meanwhile, Joon-hee becomes more confused about the changes happening to his body and mind. Later, Yoo discovers the secret So-yeon has been hiding.

Go Yoo takes a look at So-yeon's bag and finds Grandma Mo's necklace she lost. He immediately gets disappointed in her, but she does not give any explanation. Meanwhile, Joon-hee tries to think, talk, and act like Go Yoo.

Ever since the transplant, Joon-hee has been acting strangely. He has become more violent and started to act differently. Also, although he says he is looking out for So-yeon as a friend, he is being overprotective. Frustrated by Joon-hee's actions, Yoo aggressively tries to make him come back to his senses.

Yoo and Joon-hee have a huge fight in front of the whole school and end up in the teacher's office. Meanwhile, Joon-hee's grandmother collapses and gets an emergency operation.