張孝全

Liam

桂綸鎂

Mabel

鳳小岳

Aaron

張書豪

Ron

房思瑜

Hsiao-bao

丁寧

Hanako

Hung-Ying Shang-Kuan

Liam's Father

Lin Nai-Hua

Liam's Mother

Cheng-Chien Chang

Aaron's Father-in-Law

陳彥廷

Best Man

Shirley Chien

President of the Gym

Ling Chou

Oppressor Yin

Sam Ho

Ron's Husband

胡乃婷

Swim Team

郭耀仁

Military Instructor

Chia-yen Lee

Swim Team

雷婕熙

Younger Twin Sister

夏若妍

Older Twin Sister

唐國忠

John

I.-Fan Tu

Military Instructor