Kim Chi Ho (Kim Woo Bin), Lee Dong Woo (Lee Joon Ho) and Kang Gyung Jae (Kang Ha Neul) have been best friends since high school, but can their close bonds survive the challenges of growing up? Amidst shifting priorities, these friends learn important lessons in love and life, proving that while girls and work can be confusing at any age, it's especially challenging when you're a 20-year-old guy.