Undoubtedly the best BL drama I've seen so far. Firstly, finally we can see interesting characters in such a type of drama, as normally in Taiwanese BL dramas, for an unknown reason to me, the characters look as if they were mentally retarded. Here, at length, we can see a mature character of a charismatic university professor who is capable of making reasonable and courageous decisions (remarkable acting). Also, I like the fact that another guy, a student, possesses quite fresh, interesting nature and he's not like these usual passive characters, weak and feeble-minded in Taiwanese BL stories.
The chemistry is really at the point. The main cast is unimpeachable, and also I have to say that it's one of these real rare cases in an Asian drama when a child seems credible and sympathetic (another example would be "Zenkai Girl", not very good as a drama but really nice talking about the role of children).
Also the story is much more mature and sensitive when we are used to see in such dramas. I was really surprised to see such a gourmet character as a no iconic professor to be the main character in a BL story. All in all, an extremely charming show ;)