That conversation in the cafe about sex somehow seemed ominous to me.
Sure, he just promised that he and Yukari won't do it and end up like his parents...
But I can't shake off the feeling it's gonna be Satsuki he does it with... and then he ends up just like his parents did.
Oh boy, Watari-kun's xx is really going to collapse if that happens.
It's going to be a mess, and making a mess is rather the thing this manga does well.
This is a (unlikely) twist I wouldn't like the story to go through.
Bonus points to Yukari for not keeping Satsuki leaving a secret.