Both Class of Lies and GTO series are about a teacher that is different from the other teachers in the school. They make a difference in a class of troubled students, providing a unique perspective and a much needed adult figure in their lives.
They have the same actress playing the lead couple and the couple in both dramas are so sweet and have adorable chemistry. They're both eye candy as well.
The chemistry in both dramas between the leads are sweet/adorable and made me root for them, though Love O2O has less obstacles.
This drama is also about a housekeeper sent to a family with problems.