I think they are pretty straightforward in their interviews, there's one part in the 100 Q&A which asks them about a romantic story they have experienced. I wouldn't be surprised anyway if they are in a relationship, but I think the thing that is keeping them away from this is their crazy schedule.
Also as a side note, Namida no Regret isn't written by SCANDAL, so it isn't based on their own stories. (I know some people rage over it lol)
Also as a side note, Namida no Regret isn't written by SCANDAL, so it isn't based on their own stories. (I know some people rage over it lol)