I decided to watch this dorama since Tanabe Momoko, whom I had really liked both for her looks and for her acting skills in "Yuru Camp", starred in it. And indeed, she didn't disappoint me; she was absolutely gorgeous-looking in this "Konna Mirai wa Kiitenai", and she also did very well acting-wise, given the totally lousy material she had to work with (I'll elaborate more on that in a moment). The rest of the cast was also ok, with the exception of Noro Kayo (she had me climbing the walls every time she was on screen...and whenever she'd ad-lib some of those überlousy "rap lines", I seriously felt the urge to throw something at the display).
The seaside setting (my other reason for watching this, btw) was nice, but apart from the opening and ending credits, it wasn't used much, unfortunately.
The big problem this dorama had was the script, which was as terrible as they come. It reminded me of an exercise I'd have my students do in order to show them how bad a script turns out to be, without the proper planning (the exercise consisted in having them write a story where every single students could contribute only with a few lines, and what's worse, every student could only know the few lines written by the previous one, not having the slightest idea about the rest of the story; of course, with those premises, the stories turned out to be plainly terrible, lacking all coherence and structure! Well, that's totally how this dorama felt: a bunch of extremely poorly written scenes, chaotically thrown together without any logic nor any sense of how to write a script - and should I add, without any respect for the viewers. 2/10