It's just very quircky hahaha. The plot, as well as the characters are not very serious.
But its really short and nothing you really have to comit to so if you are bored or in a slump this is a perfect drama to watch.
The bus story is kind of cute and I do not know why but I am obsessed with the ML he is just so adorable.
Just give it a try and even if you dont like it the time wasted is minimal.