Han Woo-Jin and Do Ga-Young have been best friends since their high school days. Those around them ask about their relationship and they always respond that they are just friends. They now attend the same university, but study different majors. Han Woo-Jin leaves the university to fulfill his mandatory military obligation. Two years later, Han Woo-Jin is discharged from the military and goes back to school. Han Woo-Jin and Do Ga-Young again hang around each other all the time, but their relationship changes. Do Ga-Young begins to have feelings for Han Woo-Jin. ~~Based on webcomic series "Woori Sai Neueun" by Lee Yun-Ji (first published October 2, 2014)