I wonder if I'd have different thoughts on this series like others do if I started earlier on, but most of the comments are really weird since this series is actually quite good for what it's showing - healthy adult relationships with the opposite sex. Yeah, you can find people attractive, but that doesn't mean you want to date them. It's a lot easier to understand when both parties are happy in their relationships, but even when you're single you can do it if you WANT to. People often don't though. This is evidenced by people who think that there are characters being dense or leading others on, like this is your standard HS romance series.
There is no harem, MC isn't dense, there are no winning and losing heroines, and the characters are real people and aren't acting with ulterior motives or hidden feelings - there are adult relationships where people aren't forcing others to move forward just for PLOT.