It was an act of sister's love, what Myung Joo did for her younger sister Myung Yeo. A flashback revealed Joo Hong died in his garage. Myung Joo and Myung Yeo tried to escape as they got inside the car, but he got hold of steel that he used to smash the body of the car. The two sisters were so terrified of Joo Hong's rage that if he managed to reach them, they would die.

Joo Hong stood in front of the car to hit the glass again, but driven by fear, Myung Yeo stepped on the pedal, and the car started and hit Joo Hong, killing him in an instant. Myung Joo advised her sister to go home and don't let anybody know the truth. Myung Joo went into a trial, and the court found her guilty. She spent seven years in prison for murder. Since then, Myung Yeo lost her interest in writing and spent her life taking care of Hae Won.

Eun-Seob woke up and saw Hye Won still sleeping beside him. He stood and reached for his laptop, and then he started to write a poem. The title is "My first love letter to you," wherein he poured out his feelings for Hye Won.

Daybreak, Hye Won stepped out of the bookstore and walked to her place. Myung Yeo, who was sitting in one of the trees, surprised Hye Won. She asked why Hye Won spent the night in the bookstore. She didn't answer but instead signaled to go home. Myung Yeo continued that she is an adult, so it's okay if she does what she wants.

Young Soo is one of Im Hwi's long time crush. He is in the 12th grade and loves to read books as well. He asked Im Hwi if he could visit the bookstore. Im Hwi invited him to join the special book club instead. The members agreed to have an afternoon meet-up. Im Hwi introduced Young Soo to the rest of the members, but Eun-Seob's mood changed when he saw him.

Everyone teased Im Hwi with her admiration for Young Soo. She insisted that everything is in the past and she doesn't like him anymore. Eun-Seob looked hard on Young Soo, which makes the latter uncomfortable.

Bo Young returned the book she borrowed from Eun-Seob. He was surprised to see her, especially at the late hour of the night. Bo Young approached Eun-Seob and told him how she felt. Bo Young then confessed her feelings for him and said to him that she likes him for a long time. Eun-Seob said he never noticed. Bo Young asked will things change if by chance that he knew it earlier. Eun-Seob sincerely replied that things would stay the same.

Hearing this, Bo Young walked away with tears in her eyes. She went out of the bookstore and cried, thinking of their highschool days when she started to like Eun-Seob. She felt frustrated that Eun-Seob already had his eyes on Hye Won since high school.

Hye Won escaped from Myung Yeo's watch. Late at night, Hye Won stepped out from her place and stayed in the bookstore. They spent hours talking and had some funny moments in the bookstore.

Due to her desperation, Bo Young went to the forest alone. In her mind, if ever something bad happens to her in the woods, Eun-Seob would come to rescue her. She stopped at the cliff and looked down. She stood on the edge of the cliff, but before doing it, she called Eun-Seob.