Kang Dong-gyun

Young-Ung was dumped by his girlfriend. While he is in Okinawa, Japan on a business trip, the company he works for goes bankrupt. Sakura is a single mother and works for a travel agency. She needs to learn Korean for her job. At a Korean language institute, Sakura meets Young-Ung and their romance begins.

Friends since childhood, three young professionals struggle with their compulsions—schizophrenia, sex addiction, and infidelity.