I know this manga wants to just cause conflict but I still would have preferred if the boy was 20... people would be surprised how much discrimination even adult couples get for having a wide age gap.
I know the grandpa means well and loves his grandson a lot... I know the way he thinks is because he is old and was raised differently and lived a very different life compared to the current generation... I know he is just trying his best to make sure Huan Wen has a bright future... but...