Ho Ko-chun suffers from ‘Small Penis Syndrome’. As an adolescent high school student, Ko-chun often feels miserable about his penis size. Only until he meets the cheerful Lok Tsz-kwan, he can finally be energized and uplifted. Tsz-kwan reveals to Ko-chun that he, like Ko-chun, doesn’t have normal penis size. They soon build a perfect bond of friendship. They call themselves as the 'little birdmen'. Unfortunately, it doesn't last long. Tsz-kwan has to leave Hong Kong for his study while Ko-chun stays. After many years, they meet again and they never forget each other. Yet, Tsz-kwan even persuades Ko-chun to become a male prostitute with him...Career could have changed but their friendship remains the same.