Cheon Gi dot com is a triangle romance series.
"Two men love one woman", also known as triangle love, is typical, I say.
Jun Hui Lee, the female main character, is hot blooded (extremely) and straight forward girl who does not like to fool around. Jun Hui Lee has two childhood friends, Han Sung Ji and Min Yu. They were a part of her life until sudden change of Han Sung Ji.
Since then Han Sung Ji has been ignoring Jun Hui Lee.