Soojin and Christopher are best friends but there is some tension between them lately. Suddenly, a flood goes through the city of Seoul and Junhong, a friend of Christopher's, needs help. Christopher and Soojin go out in the water to bring Junhong home but... what Soojin didn't expect is to find her ex-girlfriend in distress. Soojin saves her brings Lia to Christopher's house too. Now, what will Soojin do? Her crush and her ex-girlfriend that loved so much, who will she pick? (There is more after that but I didn't end the story so I don't know how will go)