I can understand why some people didn’t like this as much. The relationship of the main cp didn’t follow a typical BL format. There’s no guessing, tug of war etc. But that’s exactly what the title is, Oxygen. You don’t have to play games with oxygen, you just naturally depend on it and can’t live without it. What I don’t like is actually the last part when they tried to make a drama out of it, going back to the old lakorn format; taking out the freshness and replaced it with cliche. Also wish they could talk about the relationship between the father and his assistant. Overall, if you fast forward the siblings/doctors part, it’s watchable BL.