Joo-Woon has not yet forgotten the memories of her first love in high school, lives on a pink campus with her pretty, angelic girlfriend, Yuri, but always remembers her first love, Na-hee, and suffers from unexplained frustration. And Na-hee, a more mature figure, suddenly appeared in front of Joo-won. Besides, they ended up living in the same boarding house?! Her first love in her memories, will her reunion with her be successful…!