Love in a Puff

A romantic comedy here in HK. I haven't (and never will, to be honest) see this movie, so I can't attest to its merits. I've seen commercials though, and from what I can gather, the guy buys cigarettes from a 7-11, and his suave smoking becomes a metaphor for whimsical romance - or something. Again what got my attention was the name - one of those titles that makes you wonder if the translator is having some fun at his clients expense. Love in a jiffy? an eyeblink? Love of righteous weed? Of secondhand smoke?