1.) Ahn Jung Ri

          She is the main character of the story. She's problematic with her life, but not her academics. She's a nerd, you see. Jung Ri watches a lot of Korean dramas and fell in love with them. After watching a load of those, she began to daydream about her own lover, since a lot of the dramams she watch have lovers that are perfect. Sadly, Jung Ri doesn't catch the eye of boys. Who would fall in love with a nerd who is clumsy and weird? When summer finally arrives, no more homework for our protagonst which means...boredom. She started to write in a small spare notebook about her dream guy to decrease her boredom this summer. She wrote his personality, likes, dislikes, and even his biography. One rainy night, Jung Ri decided what to do with his dream guy next since she practically written everything about him. Then, she remembered her grade A+ in art class. She just took a mechanical pencil and began drawing her dream guy, not knowing what's going to happen on the next day.

          She's really shy and a bit of a naive one. Jung Ri gets flustered easily, but she's tough as a pebble. She's caring and affectionate and would protect those who are important to her. Jung Ri is sensitive sometimes, but still, she's one tough cookie.

2.) L.Joe [ Lee Byung Hun or Lee Joe ]

          L.Joe is Jung Ri's closest friend out of the whole school students. Actually, he is her ONLY close friend. Jung Ri nicknamed him L.Joe because of his American name, Joe, and his last name, Lee, and she combined it to make L.Joe. L.Joe is a smart guy as well and is very social so he has some other friends unlike Jung Ri. L.Joe has hidden feelings for his nerd friend, Jung Ri, but he can't say it to her considering it might ruin their friendship.

3.) Lee Chun Ji

          Chun Ji is the main character of Jung Ri's diary. Yes, she's the dream guy that popped out of her diary and ended up beside Jung Ri in the morning the next day. There is no scientific explanation how he did that. Chun Ji's characteristics is like the ones wirtten in Jung Ri's notebook, every little detail that Jung Ri wanted in a guy which was written in her diary was Chun Ji's trait. So basically, Chun Ji was perfect to Jung Ri.