The American release for this movie will be titled "Playing It Cool", and the American trailer presents Chris Evan's character as a movie screenwriter being asked to write a romantic comedy, but the only problem is he doesn't believe he in love. That is, until he meets Michelle Monaghan who happens to be engaged. They become friends, and it seems like the classic tale of, "Pshhh, what do you mean I'm in love?" to "Oh shit, I'm in love."
The full cast includes Chris Evans, Michelle Monaghan, Aubrey Plaza, Anthony Mackie, Topher Grace, Luke Wilson, Philip Baker Hall, Giovanni Ribisi and Martin Star (LOL, parallel Marvel universe?)
It's interesting to see how different this trailer is from the Korean one lol. It doesn't look that great, but I do love that it's set in San Francisco. Also, I see it trying to be "meta" with the character trying to write a romcom, but it doesn't look very clever. Thoughts, ontd? (source link included mods!)
Source: YouTube, commentary by me