Kang Hyun-Ho has never had a boyfriend in her life. She begins swimming lessons at a sports center. There, she develops a crush on Jo Woo-Jin . Meanwhile, Han Yoo-Ra is Kang Hyun-Ho's swimming instructor. He develops feelings for her.
Park Gyu-young
Yoon Park
Jung Gun-joo
Kim Soo-jin
Heo Dong-won
