1
There is a cold character and a very energetic character in both series. One of the main characters tries to make the other's life happier/easier in his own way. Later, the other main character starts to soften and become attached to him. Both characters have past relationships. They love going each others room/condo.
Same actors, same story, same place and blue boys 2 started with ep 5 it means they are continuing s1
