Meh, it's okay. And the song's pretty good too. It has the sense of space and scale I would expect of a SS501 member and the harmonic complexity I'd hoped for as well. It's not my favorite song off Round 3 however, not by a long shot. If another song needed an MV from that release, I would have put my money on Gentleman. Admittedly, Gentleman is a bit too similar thematically to Let's Party and Leader's other releases to feel distinct so I understand not using it. But even so Like Before (예전처럼) would have been my next choice. That one has a lot of potential for the same sort of slow & sweet vibe that Your Story's MV went for, but it's just a better song. It also presents better situations to create a contrast between. Your Story is supposed to have the girl as just a memory, but as it stands the MV presents the girl and Leader as equivalent parties on the same page (which is clearly wrong because they broke up . . .). Like Before sets up melodic contrasts that could be exploited even if nothing changed cinematically.
Ah well, it's still pretty good.