Try the trailer here. http://www.mediaasia.com/loveinapuff/tc_main.html
It's not ONLY a love story. Pang Ho-Cheung is delightful, as always. Shawn Yue has a certain charm in some strange way. I personally think Miriam gave her best ever movie performance here.
P/S : It's very HK production, no "bing-bing"s, Big-S or xiao ming and the gang. The movie title is a nice play of the Taiwanese Mayday's hit song but it has nothing to do with it.