Korean Mini Series 'Blue Birthday' is a nice blend of mystery and time travel fantasy. However, it didn't prevail in other areas.

That is, as most of the drama takes place in high school, after the main lead goes back in time to prevent her best friend's death, the whole school romance feeling, as well as the enjoyment of young friendship and, of course, the nostalgia factor, were lacking. And the action and thriller scenes provided by the mystery case did not aid to hide those mistakes well enough and they did end up being missed.

That said, the drama had its good moments. The fantasy element was well done and didn't get confusing. The performances were all top-notch too and enjoyable.

So, overall, 6 out of 10.