This is a very ordinary story. Heroine have a insomnia and can't sleep. Hero is a bit arrogant but charismatic. They are a bit difficult together but it's gets better.
The second male is very weird. He didn't meet heroine from high school and want to marry her on second date. Who does that? The brother of a hero is boring and annoying. The another characters are great. Theirs plots are interesting and fresh.
There is just one song but it is not a good one. There isn't any SGI except for an animation.
Acting is quite good. And the actors have a good chemistry together.