Drama where people date more than once

Hey guys, I'm looking for dramas where the main characters have multiple relationships over time.

Something like for example Mare: spoiler in white - where Keita dated Ichiko for a while before he got together with Mare - or like Jealousy Incarnate, just please not as messy. I want them to properly be single again before they start a new relationship or fall in love with someone else. I also want the relationship to be genuine. I want them to like the person they're with and not just "settle" for them even though they really like the person they end up with later on or something like that.

I prefer jdramas but I'd check out dramas from other countries too. Preferably no melodramas or tragedies please. 

Thanks in advance. :)

@Panda: Thank you! But those sound like they break up and then get back together? Or did you mean they get divorced and then date other people? 

@Naksken: Thank you!

@NanaChin, i just realised you asked for main characters.  in You're All Surrounded it's not the main characters, well it is, but not the OTP