Chaerin is a smart and beautiful collage student . Each boys at the collage admire her but she just ignore it cause someone in her heart . The boy who Chaerin admire is Jiyong, a fashionista and talented boy . She always looked him from far..by looking at him, her heart beats really fast and at the same time , Sandara played a song called Heartbeat from 2PM. Bommie and Minji just laugh by looking at Sandara naughty act and they sing along . Chaerin's face turned red when she realize they and just walk away .

At library

Chaerin study with her bestfriends, Sandara,Bommie and Minji for their final exam.Chaerin get up and take other books from the shelves.She were looking a book titled " World History " and at the same time Jiyong looking a book at the same shelf with Chaerin. Chaerin found her book , but the book were really high and she got an idea .She elevate herself to take the book but she can't reach.An arm took the book and give it to him. It's Jiyong! Chaerin face became red "Are you okay?" Jiyong said. Chae just nodded and ran to the table. The trio was surprised to see Chaerin, Minji asked "What's wrong with you?" "Yah ! why did you run like that?" Bommie said. Chaerin just shook his head and said with a smile "Nothing. Just wanted to train for the upcoming marathon." "Why do you want to practice here? This is Library. Place to read book!" Bommie mocked. Sandara only looked Chaerin with wonder. She got up from her seat and went to the bookcase Chaerin go. Sandara walked slowly to lurk if there is someone there. She saw Jiyong choosing books. Only Jiyong were there. Sandara returned to her seat with a smile. "Why do you smile alone?" Minji asked with a laugh.

Meanwhile....

"Hah! Are you dreaming right?" "Who? Girlfriend?" Youngbae and Daesung said. Jiyong was surprised and ogle them "No! Furthermore, I do not have a girlfriend". Youngbae said, "You need one. Seungri, he's your brother and  he has a lot of girlfriends. You are too picky". Jiyong just listen and say "I'm not picky. I just want the best for me". Seunghyun enter into the library and see Youngbae and Jiyong were talking to each other. "Oh you Seunghyun!" said Daesung . Seunghyun, students most handsome and a great actor. The girls and boys envy him. Due to the great acting, many directors take to be the main character. "Let's go change clothes. We need to practice" Seunghyun said and they just nodded .