“Another one fell for me~”
Chanwoo meets his first love in college and believes they will be together forever. But he soon discovers that she has been playing with his feelings, and he was never as special to her as he thought. Hurt by the truth, Chanwoo decides to stop being so trusting and changes the way he sees relationships.
Jeonghwa notices this change and does everything she can to keep him under control. Meanwhile, Chanwoo is surrounded by his loyal friend Soyeon, his cheerful junior Jihye, and his mysterious professor Yura. With old feelings, new relationships, and hidden intentions coming together, what will happen to the five of them?