Why didn't Nana cry? 

Simple. She was used to having people leaving her. Being the only child in her family, she was usually alone at home. Of course she had friends in school but she didn't have anyone to play with when she was at home. Her parents were always away on business trips and even if they were to be home, they were busy in their room, settling business problems. 

While her parents are rarely home, the only person whom takes care of Nana was her maid. Her pet dog, Happy, was her only friend in that house.

*

A few days after Jung Ah had left, Nana has completely changed. 

From the bubbly, loud and "gagman" Nana, to the now quiet Im Jin Ah who prefers to keep things to herself. It was as though she had built a wall around herself.

Everyone noticed the changeof behaviour. Even Jung Ah and it somehow hurt her.

*

A few weeks later, Nana moved in with Juyeon. Jung Ah was previously Juyeon's roommate. She shifted because she missed her omma and was tired of having to wake up in the middle of the night, just to sleep in Jung Ah's room.

Even when Jung Ah was no longer sleeping in that room, her scent still lingered around in that room and that scent helps to ease Nana's mind and calm herself.

*

Of course Nana wasn't the only one hurting because of Jung Ah moving out. Someone else in that dorm was dying inside. Guess who?