Sana and Dahyun are forced to be dorm partners in college despite the fact that they always fight and argue with each other over stupid things. One day, Dahyun decided to go online, and look for friends. She came across a girl who seems to be really friendly, and wants to get to know her. They have grown strong affections toward each other as time passed by, so they started dating online. They shared many things about their personal life... They even ranted about how terrible their roommate were! But little did she know, the girl that Dahyun had been talking non-stop for the past month, is the one and only, Sana. 

Time flies, and they finally decided to meet each other in real life, what will happen?